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Updated: 1 hour 11 min ago

gvSIG Team: Towards gvSIG 2.4: Changing gvSIG interface. A new set of icons

8 hours 52 min ago

gvSIG has used the same set of icons for a good number of years. Therefore, we have made the decision to give the user the opportunity to change themes or icons set easily. To do that, we have created a plugin which we will describe in a post later. Here, we want to show the excellent set of icons that Mario Fèvre from the company TreCC S.A. has been created, as well as the instructions to work with them in gvSIG Desktop 2.4.

In addition to both tool sets, a complete guide for styles has been created. You can check this out here (now in Spanish).

There are two sets, one where the icons size is 16×16 and the other with 22×22. This second one meets the demands of part of the gvSIG community that asked to work with larger buttons.

The two sets can be downloaded in the following links:

Any of them can be installed, once downloaded, by using the “Set administrator > Using file”, so far (they will be also available in the official repository in the final version). You should select either “TreCC-icon-set” … 22×22 or 16×16, depending on your preferences.

Once it is installed, gvSIG Desktop must be restarted. Then, there´s one more step to indicate to the application in case one of the new set of icons wants to be used.

Go to “Preferences > General/Set of icons” and choose the icons set to be used as shown in the picture below:

Then, restart gvSIG Desktop to see the new interface of our favorite GIS. By the way, in the last builts there’s no option to go back and see the traditional set of icons (do not forget that we are in the test phase) although we expect to include this option in the future builts.

Here a short video that shows the new gvSIG Desktop:

Finally, we would like to mention that gvSIG Desktop 2.4 will be launched with the “traditional” set of icons. This is not just the one that most of the users are familiar with but also it is the one that all the existing documents are referred to. However, the new icons will be also at your disposal in the application. Eventually, in the next versions, we will consider the opposite: gvSIG will be able to be released with the new icons set, with the traditional one available.


Filed under: english, gvSIG Desktop Tagged: gvSIG-2.4, Set of icons, symbology
Categories: OSGeo Planet

Free and Open Source GIS Ramblings: Dynamic styling expressions with aggregates & variables

Sat, 2017-07-22 18:56

In a recent post, we used aggregates for labeling purposes. This time, we will use them to create a dynamic data driven style, that is, a style that automatically adjusts to the minimum and maximum values of any numeric field … and that field will be specified in a variable!

But let’s look at this step by step. (This example uses climate.shp from the QGIS sample dataset.)

Here is a basic expression for data defined symbol color using a color ramp:

Similarly, we can configure a data defined symbol size to create a style like this:

Temperatures in July

To stretch the color ramp from the attribute field’s minimum to maximum value, we can use aggregate functions:

That’s nice but if we want to be able to quickly switch to a different attribute field, we now have two expressions (one for color and one for size) to change. This can get repetitive and can be the source of errors if we miss an expression and don’t update it correctly …

To avoid these issues, we use a layer variable to store the name of the field that we want to use. Layer variables can be configured in layer properties:

Then we adjust our expression to use the layer variable. Here is where it gets a bit tricky. We cannot simply replace the field name “T_F_JUL” with our new layer variable @style_field, since this creates an invalid expression. Instead, we have to use the attribute function:

With this expression in place, we can now change the layer variable to T_M_JAN and the style automatically adjusts accordingly:

Temperatures in January

Note how the style also labels the point with the highest temperature? That’s because the style also defines an expression for the show labels option.

It is worth noting that, in most cases, temperature maps should not be styled using a color ramp that adjusts to a specific dataset’s min and max values. Instead, we would want a style with fixed value to color mapping that makes different datasets comparable. In many other use cases, however, it is very convenient to have a style that can automatically adapt to the data.


Categories: OSGeo Planet

GIScussions: Pay it forward

Fri, 2017-07-21 12:53

Pocket Change

FOSS4G starts in Boston in just over 3 weeks time, there will be close on 1000 attendees (could go higher if you are one of the late registrations) learning, sharing, networking, having a bit of geofun, making new friends and building the Open Source Geo community. There will be hundreds of presentations, workshops, keynotes, lightning talks, birds of a feather, meet ups, loads of QGIS and lots of new stuff. So who wouldn’t want to be there?

Look at the map of delegate home countries

Not many delegates from the southern hemisphere are there? Most of the delegates are from the US and Western Europe, which is understandable – a week in Boston at FOSS4G will cost at least $1,500 plus the cost of flights, outside the budget of many people.

Thanks to some generous sponsorship we have been running a FOSS4G Travel Grant Programme to help some FOSS4G contributors and enthusiasts to join us in Boston, we have now made 10 awards to people from the lowest 3 World Bank income categories (that’s mainly incomes of less than $4,000 pa).

There were many more deserving applicants than we had funds to support, so we want to do a bit of crowdfunding to raise money to bring a few more to Boston

  • Every 60 people who donate $25 will enable 1 extra person to attend FOSS4G
  • If everyone who has registered for FOSS4G chipped in just $15 we could bring 10 more people to FOSS4G
  • If you or your company are feeling very generous, you could even sponsor 1 individual yourself
So why should you put your hand in your pocket? Do you remember the person who helped you to get started in geo? Do you remember the buzz from attending your first big geo conference, maybe it was a FOSS4G, maybe it was an ESRI UC, maybe it was an AGI GeoCommunity? Maybe, you don’t even do geo, but you still remember someone who helped you to get started on the path that you are following. Now is an opportunity to “Pay it forward” and help someone else to get started in geo and make a difference in their home country.

Go on, dig deep, dig a bit deeper, you will feel good about your donation and someone else will get the chance to experience the goodness of FOSS4G. So click on the donate button now (the money will go to OSGeo Foundation and PayPal waive credit card charges as they are a NFP)

May the FOSS be with you

 

Categories: OSGeo Planet

Fernando Quadro: Geolocalização no Hipsters.tech

Fri, 2017-07-21 12:39

Esta semana foi a vez da Geoinformação ser abordada no podcast Hipsters.tech, promovido pela Alura. O episódio #53 foi um bate papo que contou com a presença de Roberto Marin (CTO da Maplink) e Fred Hohagen (CEO e fundador da Maplink) além dos hosts Paulo Silveira e Maurício Linhares.

O bate papo foi bastante interessante sendo discutidos assuntos como Geomarketing, Geolocation, Big data, logística, entre outros bastante relevantes.

Indico aqueles que tenham interesse ouvir o podcast, pois vale a pena. Se você quiser escutar pode iniciar agora mesmo clicando no play logo abaixo:

Categories: OSGeo Planet

Jackie Ng: So ... where's MapGuide Open Source 3.2?

Thu, 2017-07-20 15:25
Here's the story, since I gather not everyone reads the mapguide-users mailing list where I mentioned this subject many months ago.

I've decided (many months ago) to skip on making this release.

The differences between 3.1 and (a 3.2 release if I had decided to make one) is so small that it isn't worth investing the build resources on a 3.2 release cycle.

Since I'm skipping on a 3.2 release, it means that we have a good year-long window of solid development time to get some compelling features into the release after it (currently set as 3.3). Some of this development work is already starting to bear fruit.

Now that's not to say there isn't going to be a MapGuide release sometime between now and when 3.3 is out. I still do hope to put out the (hinted previously) patch releases for MGOS 2.6, 3.0 and 3.1 in between, but that requires me rebuilding my build infrastructure first and that is currently taking a back seat to landing some solid features into 3.3 first, so that's where things are at.

And as always. As these features land, you can expect this blog to talk about it.
Categories: OSGeo Planet

gvSIG Team: 9as Jornadas da América Latina e do Caribe de gvSIG: “gvSIG: Geotecnologias livres e desenvolvimento sem fronteiras”

Wed, 2017-07-19 06:23

De 4 a 6 de outubro de 2017 serão realizadas as 9as Jornadas gvSIG da América Latina e do Caribe (LAC) em Santa Maria (Rio Grande do Sul – Brasil) sob o lema “gvSIG: Geotecnologias livres e desenvolvimento sem fronteiras”, a nova reunião de usuários e desenvolvedores ligados ao software gvSIG organizada no Brasil.


Já está aberto o período para  envio de propostas para comunicações. A partir de hoje as comunicações podem ser enviadas ao seguinte endereço eletrônico: jornadas.latinoamericanas@gvsig.org. Toda as informações sobre as normas para a apresentação de comunicações podem ser consultadas no tópico comunicações. O período de submissão de resumos se encerra no dia 26 de agosto.

O período de inscrições para as Jornadas LAC será aberto no dia 8 de agosto. As inscrições são gratuitas (vagas limitadas).


Filed under: community, events, portuguese, training Tagged: 9as Jornadas LAC
Categories: OSGeo Planet

gvSIG Team: 9as Jornadas de Latinoamérica y Caribe de gvSIG: “gvSIG: Geotecnologias livres e desenvolvimento sem fronteiras”

Tue, 2017-07-18 15:44

Del 4 al 6 de octubre de 2017 se celebrarán las 9as Jornadas de Latinoamérica y Caribe de gvSIG en Santa María (Rio Grande do Sul – Brasil) bajo el lema “gvSIG: Geotecnologias livres e desenvolvimento sem fronteiras”, un nuevo encuentro para el intercambio de experiencias en el uso y desarrollo de gvSIG.

Ya está abierto el periodo para el envío de propuestas para comunicaciones para las Jornadas. Desde hoy pueden enviarse las propuestas a la dirección de correo electrónico jornadas.latinoamericanas@gvsig.org, y serán valoradas por el comité científico de cara a su inclusión en el programa de las Jornadas. Toda la información sobre las normas para la presentación de comunicaciones puede consultarse en el apartado de Comunicaciones de la web. El periodo de recepción de resúmenes finalizará el próximo 26 de agosto.

El periodo de inscripción a las mismas se abrirá el próximo día 8 de agosto. La inscripción será gratuita.

¡Esperamos vuestras propuestas!


Filed under: community, events, portuguese, spanish, training Tagged: 9as Jornadas LAC
Categories: OSGeo Planet

gvSIG Team: Learn GIS for free. Extra Module : GPS and Mobile GIS

Tue, 2017-07-18 12:55

Although “Learn GIS for free” course ended with the tenth module, today we offer you an extra module very interesting for those who are interested in using Mobile GIS to capture field data.

In this module you will know Geopaparazzi. It’s a tool developed to do fast qualitative technical and scientific surveys.

Note 1: We are working on a new version of gvSIG Mobile, based on Geopaparazzi and we hope to be able to give you news soon.

Note 2: It is also interesting that you know that there is a Geopaparazzi plugin in gvSIG Desktop that will be very useful for those who will work with these 2 applications of gvSIG Suite.

Extra 1. GPS System

Extra 2. GPS Survey

Extra 3. GPS to GIS

Enjoy and spread gvSIG Suite!

Giuliano Ramat made this course in the framework of a collaboration between the gvSIG Association and GISMAP.

Related posts:


Filed under: english, Geopaparazzi, gvSIG Desktop, training Tagged: course, free, GPS, survay, tutorial
Categories: OSGeo Planet

Fernando Quadro: MBA em Geociências e Geotecnologias

Mon, 2017-07-17 20:05

Na área de Geociências existem pouquíssimos cursos profissionalizantes, bem como de graduação, e esta é uma área que toma cada vez mais importância. Este curso promove uma visão ampla e traz temas extremamente novos, interessantes e totalmente aplicáveis. A aplicação prática dos módulos apresenta ao aluno uma usabilidade direta do que está sendo proposto aumentando assim as possibilidades profissionais tanto do mesmo como da empresa na qual ele trabalha.

O curso é promovido pelo IPOG – Instituto de Pós-graduação e Graduação, uma Instituição de Ensino Superior (IES) onde o diferencial competitivo tem se dado pelos surpreendentes e duradouros resultados conquistados pelos programas de especialização. Cursos que, na maioria, são inéditos e contam com projetos pedagógicos arrojados, ministrados por um corpo docente altamente qualificado em preparar o aluno com bases sólidas, transformando-o em um profissional de alta performance.

Se você ficou interessado, e quer ter mais informações do curso, como ementa, diferenciais, entre outras coisas, acesse o link abaixo:

https://www.ipog.edu.br/curso/engenharia-arquitetura/mba-geociencias-e-geotecnologias/

Categories: OSGeo Planet

gvSIG Team: Learn GIS for free. Module 10: Digital Elevation Model analysis

Fri, 2017-07-14 10:35

We finish this free GIS course with the tenth module, where we show you how to work with Digital Elevation Models.

Digital Elevation Models (DEMs) are raster files with elevation data for each raster cell. DEMs are popular for calculations, manipulations and further analysis of an area, and more specifically analysis based on the elevation.

To follow the course you need:

10.1 DEM analysis in gvSIG

10.2 DEM derived data

10.3 DEM Visibility

Enjoy and spread gvSIG Desktop!

Giuliano Ramat made this course in the framework of a collaboration between the gvSIG Association and GISMAP

Related posts:


Filed under: gvSIG Desktop Tagged: course, DEM, Elevation Model, free, gis, raster, tutorial
Categories: OSGeo Planet

Fernando Quadro: Usando GeoServer com Docker

Thu, 2017-07-13 10:30

Na publicação de hoje vou falar um pouco sobre o uso do Docker com o GeoServer utilizando o Geodocker. As etapas abaixo foram testadas em um ambiente onde foi instalado o Ubuntu 17.04.

Para instalar o Docker veja a descrição em https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/ na seção “Instalar usando o repositório”.

Em seguida, adicione o usuário atual ao grupo de usuários do docker (caso contrário, todos os comandos do docker devem ser prefixados com sudo):

$ sudo gpasswd -a $USER docker $ newgrp docker

Para iniciar, tente executar a imagem de teste do “Olá Mundo”

$ docker run hello-world

Para entender um poucos mais sobre Docker e mais alguns conceitos básicos, consulte: https://github.com/docker/labs/blob/master/beginner/chapters/alpine.md

Você pode baixar o seu Geodocker, por exemplo, de https://quay.io/organization/geodocker da seguinte maneira:

$ sudo docker pull quay.io/geodocker/base $ sudo docker pull quay.io/geodocker/geoserver

Para obter uma lista de imagens que já foram baixadas você pode executar o seguinte comando:

$ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE quay.io/geodocker/geoserver latest c60753e05956 8 months ago 904MB quay.io/geodocker/base latest 293209905a47 8 months ago 646MB

Agora tente executar a imagem base do Geodocker quay.io/geodocker/base

$ docker run -it --rm quay.io/geodocker/base:latest java -version java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

Feito isso, execute então a imagem do GeoServer através de quay.io/geodocker/geoserver

$ docker run --name geoserver -e AUTHOR="Anita" \ -d -P quay.io/geodocker/geoserver

As opções importantes são:

-d … Executar em background e apresentar o ID do container

-P … Publique todas as portas expostas a portas aleatórias

Agora que você já subiu seu docker, verifique se ele está em execução:

$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 684598b57868 quay.io/geodocker/geoserver "/opt/tomcat/bin/c..." 2 hours ago Up 2 hours 0.0.0.0:32772->9090/tcp geoserver

Você também pode verificar quais portas estão abertas para acesso através do comando abaixo:

$ docker port geoserver 9090/tcp -> 0.0.0.0:32772

Parabéns, o seu Docker Geoserver agora está sendo executado em http://localhost:32772/geoserver/ (user = admin, password = geoserver).

Fonte: Free and Open Source GIS Ramblings

Categories: OSGeo Planet

Petr Pridal: GeoPackage in MapTiler 8.0

Thu, 2017-07-13 10:14


MapTiler 8.0 is here - and it can generate map tiles in OGC GeoPackage format. The standardized OGC GeoPackage can store the tiles in the most popular mercator profile as well as in the coordinate systems specific for your country.

For the standard tile profile in Mercator - the generated GeoPackage file (.gpkg) is also compliant to MBTiles format in the same moment - which makes it very versatile and compatible with many viewers and software tools.
Our utility for direct fast uploading of the map tiles to the most popular cloud hostings (such as Google Cloud Storage or Amazon S3 buckets) now supports the GeoPackage format too - for all profiles generated by MapTiler. This means you can push any tiles to a reliable hosting which costs a few cents - and you get a web viewer and WMTS compatible with ArcGIS and QGIS. This including map tiles in a local coordinate system - and available for batch processing and automation as `cloudpush` command in the terminal.
It is possible to drop 16-bit raster input files into MapTiler - and they are automatically scaled into 8-bit RGBA output tiles - which eliminates the need for extra preprocessing in some cases. 
MapTiler graphic interface now allows to visually pick a colour for transparency from the input file.There is no need to use 3rd party software to select  required background colour of your map.
We have updated the internal Proj4 library with the latest database of the coordinate systems and projections.MapTiler 8.0 also includes the following features: - QuadKey tiling scheme output in the folder (known from Microsoft Bing Maps) - Online preview of the bounding box for the input file - The GUI remembers Amazon S3 / Google Cloud Storage credentials - Global projected cutline applicable on more input files [Pro command line]

The updated version is now available at http://www.maptiler.com/. Try it out for free now!
Categories: OSGeo Planet

gvSIG Team: “Learning GIS with Game of Thrones” free book

Wed, 2017-07-12 16:54

Have you decided to learn to work with a Geographic Information System and you don’t know how to start? Now that the premiere of the new season of Game of Thrones series will be in a few days, we recommend you do it using the book that we have just published: “Learning GIS with Game of Thrones“.

This book compiles a series of post with practical exercises that have been published in the gvSIG project blog previously. The objective is that anyone, without previous knowledge and through a series of practical exercises, learn to handle a GIS in an entertaining and funny way.

Everything necessary to follow the course is available free of charge, including gvSIG Desktop software – a free GIS used in more than 160 countries – as well as the data (download links are available in the book) and this tutorial, distributed with a Creative Commons license.

At the end of the book we have added a section with a series of links for those who want to delve into the learning of a Geographic Information System.

You can download it from: http://downloads.gvsig.org/download/documents/books/GoT_book_GIS_gvSIG.pdf

Enjoy it!


Filed under: english, gvSIG Desktop, training Tagged: free book, Game of Thrones, training
Categories: OSGeo Planet

Free and Open Source GIS Ramblings: Docker basics with Geodocker GeoServer

Wed, 2017-07-12 13:22

Today’s post is mostly notes-to-self about using Docker. These steps were tested on a fresh Ubuntu 17.04 install.

Install Docker as described in https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/ “Install using the repository” section.

Then add the current user to the docker user group (otherwise, all docker commands have to be prefixed with sudo)

$ sudo gpasswd -a $USER docker $ newgrp docker

Test run the hello world image

$ docker run hello-world

For some more Docker basics, see https://github.com/docker/labs/blob/master/beginner/chapters/alpine.md.

Pull Geodocker images, for example from https://quay.io/organization/geodocker

$ docker pull quay.io/geodocker/base $ docker pull quay.io/geodocker/geoserver

Get a list of pulled images

$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE quay.io/geodocker/geoserver latest c60753e05956 8 months ago 904MB quay.io/geodocker/base latest 293209905a47 8 months ago 646MB

Test run quay.io/geodocker/base

$ docker run -it --rm quay.io/geodocker/base:latest java -version java version "1.8.0_45" Java(TM) SE Runtime Environment (build 1.8.0_45-b14) Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

Run quay.io/geodocker/geoserver

$ docker run --name geoserver -e AUTHOR="Anita" \ -d -P quay.io/geodocker/geoserver

The important options are:

-d … Run container in background and print container ID

-P … Publish all exposed ports to random ports

Check if the image is running

$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 684598b57868 quay.io/geodocker/geoserver "/opt/tomcat/bin/c..." 2 hours ago Up 2 hours 0.0.0.0:32772->9090/tcp geoserver

You can also check which ports to access using

$ docker port geoserver 9090/tcp -> 0.0.0.0:32772

Geoserver should now run on http://localhost:32772/geoserver/ (user=admin, password=geoserver)

For more tests, let’s connect to Geoserver from QGIS

All default example layers are listed

and can be loaded into QGIS


Categories: OSGeo Planet

Fernando Quadro: A História do Open Source GIS

Wed, 2017-07-12 11:29

O advento do mapeamento digital e dos sistemas de informação geoespacial (SIG) mudou completamente a maneira como os humanos pensam e interagem com o mundo ao seu redor. O conceito de sobreposição de camadas discretas de informações de localização para tomada de decisão foi introduzido pela primeira vez por Ian McHarg, um arquiteto paisagista, na década de 1960. Ao mesmo tempo, Roger Tomlinson – conhecido universalmente como o “Pai do SIG” – completou sua tese de doutorado focada no uso de métodos de computação para a sobreposição de informações geoespaciais. Roger então trabalhou para criar o primeiro SIG computarizado, o Sistema de Informações Geográficas do Canadá, que foi usado principalmente para pesquisa.

As raízes do SIG de código aberto remontam o U.S. Department of the Interior em 1978. Desde então, o SIG de fonte aberta permeou muitas indústrias, tanto governamentais como comerciais e, naturalmente, teve uma trajetória e impacto diferentes do que a sua propriedade, contrapartida baseada em licença. O U.S. Department of Labor denominou a tecnologia geoespacial como uma das três maiores indústrias de alto crescimento no século XXI. A evolução do SIG de código aberto nas últimas quatro décadas levou a suas inúmeras aplicações inovadoras e impactantes hoje em dia.

1. O início do SIG: MOSS e GRASS

Em 1978, o Departamento do Interior dos EUA criou o Sistema de Sobreposição e Estatística do Mapa (MOSS). O MOSS foi criado com o objetivo de rastrear e avaliar o impacto do desenvolvimento do meio ambiente, na vida selvagem e nos padrões de migração. Foi o primeiro GIS interativo amplamente implantado, baseado em vetores, bem como o primeiro GIS a ser implantado para uso de produção em minicomputadores.

GRASS (Sistema de Suporte à Análise de Recursos Geográficos) seguiu logo depois, com mais de 350 módulos para processar raster, vetor, processamento de imagem e dados gráficos. O software foi originalmente criado para ser usado pelos militares dos EUA para auxiliar na gestão da terra e no planejamento ambiental. O GRASS é amplamente utilizado hoje em ambas as áreas científicas e comerciais para gerenciamento e análise de dados geoespaciais, processamento de imagem, modelagem espacial e temporal e criação de gráficos e mapas.

2. GeoTools, GDAL, PostGIS e GeoServer

Em 1996, a Universidade de Leeds estabeleceu um projeto para criar uma biblioteca GIS baseada em Java que poderia ser incorporada em diferentes aplicativos conforme necessário. O resultado final, GeoTools, serve como uma biblioteca de código aberto para a manipulação de dados geoespaciais e hoje é amplamente utilizado em servidores de recursos geoespaciais na Web, servidores de mapas da Web e aplicativos desktop.

Quatro anos depois, uma biblioteca geoespacial chamada Biblioteca de Abstração de Dados Geoespaciais (GDAL) surgiu em cena. O GDAL torna possível o uso de aplicativos GIS para suportar os diferentes formatos de dados que existem em todo o mundo SIG. Além disso, vem com uma variedade de úteis utilitários de linha de comando para processamento e tradução de dados em vários formatos. Com suporte para mais de 50 formatos raster e 20 formatos de dados vetoriais, é a biblioteca de acesso a dados geoespaciais mais utilizada no mundo, suportando aplicativos como o Google Earth, o Sistema de Suporte de Análise de Recursos Geográficos (GRASS), QGIS, o Feature Manipulation Engine (FME) E ArcGIS.

Em 2001, a Refractions Research desenvolveu o programa de código aberto PostGIS para habilitar espacialmente os dados armazenados no banco de dados do Postgres. No mesmo ano, o GeoServer, um aplicativo Java para publicação de dados como serviços web baseados nos padrões OGC, também foi criado. Tanto o PostGIS como o GeoServer foram projetos incrivelmente bem-sucedidos e são conhecidos hoje como o banco de dados GIS de código aberto e o servidor de mapas mais amplamente utilizados.

3. Projetos de código aberto impulsionam a inovação e a educação

O QGIS é amplamente considerado como o novo SIG de desktop de código aberto. Lançado em 2002, incorpora funções analíticas do GRASS, juntamente com o suporte ao formato de dados do GDAL, em uma aplicação de desktop amigável para realizar a edição de dados, a cartografia e a análise. O QGIS é interoperável com outras aplicações GIS de código aberto, por exemplo; Gerenciamento de dados do banco de dados PostGIS e publicação de dados no GeoServer como serviços da Web.

Como o SIG de código aberto continuou a ganhar força no início dos anos 2000, OSGeo e LocationTech foram criados para incubar projetos de código aberto. O OSGeo, lançado em 2006, foi projetado para apoiar o desenvolvimento colaborativo de software geoespacial de código aberto, bem como para promover o seu uso generalizado. O LocationTech, um grupo de trabalho dentro da Fundação Eclipse , foi criado para facilitar a colaboração SIG entre acadêmicos, indústria e comunidade.

Em 2011, Geo for All , o programa de divulgação educacional da Open Source Geospatial Foundation, foi fundado com o objetivo de tornar a educação e oportunidades geoespaciais acessíveis a todos. Como resultado do trabalho da fundação, muitos recursos educacionais para SIG de código aberto agora estão disponíveis gratuitamente na internet, incluindo a Academia FOSS4G e a GeoAcademy. O Geo for All eventualmente leva ao estabelecimento de laboratórios geoespaciais de código aberto e centros de pesquisa em todo o mundo para apoiar o desenvolvimento de tecnologias, treinamento e expertise de software de geoespacial de código aberto.

4. Suporte comercial de um SIG de código aberto

Em 2013, a Boundless, tornou-se a primeira empresa a fornecer suporte comercial e manutenção para os aplicativos GIS de código aberto mais populares do mundo nos níveis de banco de dados, servidor, desktop, web, celular e nuvem. O pacote de produtos Boundless “garante que as organizações que utilizam SIG de código aberto em configurações operacionais tenham o suporte técnico de que precisam para ter sucesso”. A empresa oferece aprimoramentos contínuos e manutenção para os softwares GIS open source mais popular.

5. O futuro e além

Os modernos desafios de computação exigem que o software funcione na nuvem e dê suporte as demandas apresentadas pelos enormes volumes de dados que estão sendo criados. Duas soluções de software GIS de código aberto projetadas para atender a esses desafios incluem GeoMesa, um banco de dados de fonte aberta, distribuído e espaço temporal, e o GeoTrellis, um mecanismo de processamento de dados geográficos para aplicações de alto desempenho.

Ambas as soluções, introduzidas em 2014, permitem o processamento de grandes dados geoespaciais na nuvem. Uma vez que eles são criados em frameworks de código aberto e não requerem licenças, e os usuários podem escalar o máximo que for necessário sem serem penalizados.

O SIG de código aberto é uma grande promessa e potencial, pois permite uma maior colaboração, compartilhamento de dados valiosos e acesso a recursos-chave. Com suas muitas aplicações ambientais, governamentais, de segurança pública e de saúde, o SIG de código aberto e os projetos que eleva tem potencial para mudar o mundo.

Este texto foi escrito originalmente em inglês por Anthony Calamito. Esta é uma tradução livre com algumas adaptações realizadas por mim.

Fonte: The New stack

Categories: OSGeo Planet

gvSIG Team: Learning GIS with Game of Thrones (XV and last): Add-ons installing

Wed, 2017-07-12 11:28

We are going to dedicate this last post to the “Add-ons manager”, a tool that every gvSIG Desktop user should know.

The add-ons manager is a tool that allows to customize gvSIG, installing new extensions, functional ones as well as other types (symbol libraries). It can be run from the “Tools/Add-ons manager” menu, although it can be accessed during the installing process.

Thanks to the “Add-ons manager” you can access to the plugins not installed by default as well as to the new tools that are published after a final version.

At the window that appears firstly you have to select the add-ons installation source:

The add-ons can have 3 sources:

  • The own installation binary. The file that we have downloaded has a lot of plugins and add-ons, and some of them are not installed by default, but they are available to install. It allows to customize gvSIG without an internet connection.

  • Installation from file. We can have a file with a set of extensions to be installed on gvSIG.

  • From URL. Through an internet connection we can access to all the add-ons available at the gvSIG server and install those that we need. It’s the recommended option when we want to consult all the add-ons available.

Once the installation source is selected you have to press “Next”, and it will show the list of plugins available.

The add-ons manager interface is divided in 4 parts:

  1. List of available add-ons. The plug-in name, version, and type are indicated. The verifcation check boxes allow to distiguish between available (white) or already installed add-ons (green). You also can see the meaning of the icons.

  2. Information area concerning the plug-in selected in “1”.

  3. Area that shows the “Categories” and “Types” in which the plug-in is classified. When we choose a category or type from the list, a filter that runs on “1” shows only the plug-ins related to this category or type.

  4. Fast filter. Enables a filter from a text string entered by the user.

In our case we are going to install a new symbol library. For that we will select “Symbols” category, that will filter by “symbol libraries” plugins:

Now we will mark “G-Maps” library:

Then we press “Next” button and once it’s installed we press “Finish”. A message will indicate that we have to restart gvSIG, but it’s not necessary for symbol libraries. We would have to do it for functional plugins only.

Now, if we are going to change the symbology of any of our layers, for example “Locations”, we will see that we have the new symbols available:

You can see the symbol libraries available in the gvSIG documentation.

And with this last post we finish this atypical course about introduction to GIS. We expect that you have learnt, and besides it has been as much funny as for us to do it.

From this point you are prepared to go more deeply into the application and discover all its power. 

And a last advice… you can use the mailing lists to consult any doubt or tell us any problem that you find:

http://www.gvsig.com/en/community/mailing-lists


Filed under: english, gvSIG Desktop, training Tagged: Add-ons manager, Game of Thrones, symbology

Categories: OSGeo Planet

gvSIG Team: Learning GIS with Game of Thrones (XIV): Layouts

Wed, 2017-07-12 11:27

At this second-to-last post of the course to learn the base of the Geographic Information Systems through practical exercises with Game of Thrones data we are going to work with the “Map” document.

A Layout document is a set of design elements of a map, organized in a virtual page, the objective of which is its graphical output (printing or exporting to PDF file). The elements that we see in the design are the elements that are printed or exported to the PDF file, being in the same paper size that we have selected on the screen. We can add two different type of elements in a Layout: Cartographic elements and design ones.

In our case we are going to create a map with the path followed by Greyjoy brothers, that we drew in the post about “Graphical editing“. 

Once we have our project open in gvSIG, firstly we are going to open the “Project manager” window. A fast way to do it is through the “Show/Project manager” menu. We select the “Map” type of document and we press “New”. A new window will be opened, where we can define the characteristics of the Map page. 

In our case we are going to select “A4” for the page size, then “Horizontal”, and we will select the View where we had our layers loaded instead of “Create new View” option. If you have more than one View in your project you will see a list with all of them.

You will see that a new map is created where the indicated View is added with a full extent at the page:

Pressing on the “black squares” that appear in the borders and medium points of the rectangle that defines the View extension we can change its size. At this way we are defining the design of our map. Clicking on the View element inserted and dragging it we can move it. In our case we resize the View inserted and we move it, and now we will insert other cartographic elements.

Most of the cartographic elements are closely linked to a View document, so that when making changes to the View, they can be reflected in the map (changes of zoom, displacements, legend changes, organization of layers, etc.). These tools are available from the “Map / Insert” menu and the corresponding button bar.

Let’s start by inserting the legend. This tool is available from the menu “Map / Insert / Legend” or from its button:

The legend is always associated with a View inserted in the Map and allows to represent the symbology of the different layers of that View. Once the tool is selected, we will indicate the first end of the rectangle defining the space to be filled by the legend. It will be indicated by clicking on the Map area at the desired location, and dragging until released at the opposite end. A dialog box will appear where you can define the graphic properties of the inserted legend:

In this window we can mark which layers (its symbology) we want to show in the legend..

Next we insert a North symbol. This tool is available from the  “Map / Insert / North” menu and from its corresponding button:

Once the tool is selected, the first end of the rectangle that defines the space to be occupied by the north symbol will be indicated by clicking on the Map area at the desired location, and dragging until released at the opposite end. A dialog box will appear where you can define the graphic properties of the inserted north:

And our Map will be like this one:

Finally, we will insert a title using the “Insert Text” tool (in the Map / Insert / Text menu or its corresponding button). The operation is similar to the other elements, and in this case we will indicate the text that we want to write: “Greyjoy Brothers”.

From here, to avoid extending this post, we recommend you to review the documentation related to the Map document where you will be able to see how to add graphic scales, boxes, etc. With practice you can create really well designed maps.

Once you have your map you can export it to a PDF file from this button:

You can send your PDF file to all your contacts already.

As it’s said, practice makes perfect.

To finish the course there’s only one post pending… don’t miss it.


Filed under: english, gvSIG Desktop, training Tagged: Game of Thrones, layout, map, pdf, print
Categories: OSGeo Planet

gvSIG Team: Learn GIS for free. Module 9: Raster reclassification and raster calculator

Wed, 2017-07-12 09:58

We continue with the ninth module of the free GIS course, where we continue to show you how to work with gvSIG Desktop, in this case working with raster reclassification and rasterization tools, and learning what can we do with raster calculator.

To follow the course you need:

9.1 Raster reclassification

9.2 Raster calculator

Enjoy!

Giuliano Ramat made this course in the framework of a collaboration between the gvSIG Association and GISMAP

Related posts:


Filed under: english, gvSIG Desktop, training Tagged: calculator, course, free, gis, raster, rasterization, reclassification, tutorial, video
Categories: OSGeo Planet

gvSIG Team: Libro gratuito “Aprendiendo SIG con Juego de Tronos”

Tue, 2017-07-11 12:24

¿Te has propuesto aprender a trabajar con un Sistema de Información Geográfica y no sabes por dónde empezar?. Ahora que quedan días para el estreno de la nueva temporada de la serie Juego de Tronos te recomendamos que lo hagas utilizando el libro que acabamos de poner disponible “Aprendiendo SIG con Juego de Tronos”.

Este libro recopila una serie de post con ejercicios prácticos publicados previamente en el blog del proyecto gvSIG. El objetivo es que cualquier persona, sin conocimientos previos y mediante una serie de ejercicios prácticos, aprenda a manejar un SIG de una forma amena y divertida.

Todo lo necesario para seguir el curso está disponible de forma libre y gratuita, tanto el software gvSIG Desktop – un SIG libre utilizado en más de 160 países – como los datos (tenéis los enlaces de descarga en el libro) y este propio tutorial que se distribuye con licencia Creative Commons.

Al final del libro hemos añadido un apartado con una serie de enlaces para los que quieran profundizar en su aprendizaje de un Sistema de Información Geográfica.

Podéis descargarlo en: http://downloads.gvsig.org/download/documents/books/Libro_GoT_SIG_gvSIG.pdf

¡Qué lo disfrutéis!


Filed under: gvSIG Desktop, spanish Tagged: curso, ejercicios, gratis, iniciación, Juego de tronos, mapas, sig, Sistemas de Información Geográfica, tutorial
Categories: OSGeo Planet