OSGeo Planet

gvSIG Team: Camino a gvSIG 2.4: Geoproceso de dispersión de puntos

OSGeo Planet - Mon, 2017-10-02 16:16

Presentamos otra novedad de la próxima versión de gvSIG Desktop, un geoproceso que permite separar una distancia definida puntos que estén ubicados en las mismas coordenadas (o cercanas, según un grado de tolerancia que definamos).

Este geoproceso puede ser de gran utilidad cuando debemos identificar visualmente elementos que en su toma de datos nos llegan en la misma ubicación. Por ejemplo, datos referidos a centro de eje de calle.

Tal y como indica la ayuda de gvSIG: este geoproceso permite dispersar los puntos de una capa que se superponen alrededor de un punto central. Dada una capa de puntos, una distancia de concordancia y un radio de dispersión, este algoritmo recorre la capa de origen buscando grupos de puntos cuya distancia sea menor o igual a la distancia de concordancia y los dispersa, según el radio de dispersión, alrededor del centro de dicho grupo, generando una nueva capa de puntos con el resultado.

Podéis ver cómo funciona en el siguiente vídeo (el vídeo está grabado con el nuevo juego de iconos):


Filed under: gvSIG Desktop, spanish Tagged: Dispersar puntos, separar puntos
Categories: OSGeo Planet

gvSIG Team: SIG aplicado a Gestión Municipal: Módulo 3 ‘Vistas, capas, simbología, etiquetado’

OSGeo Planet - Mon, 2017-10-02 12:14

En este tercer módulo, el primero de la parte práctica, hablaremos de cómo crear un proyecto en gvSIG Desktop, incluyendo Vistas y añadiendo capas en ellas. Sobre las capas aplicaremos también una leyenda, y veremos cómo añadir etiquetas a los elementos de la misma.

Para seguir este módulo deberéis instalar gvSIG y descargar la cartografía, y aunque se explica en el propio vídeo vamos a resumir aquí cómo hacerlo:

  1. Acceder al apartado de descargas de gvSIG Desktop de la web de gvSIG: http://www.gvsig.com/es/productos/gvsig-desktop/descargas
  2. Descargar la versión de gvSIG correspondiente a vuestro sistema operativo. Hay dos distribuciones disponibles:
    1. instalable: Se instala en el ordenador mediante un asistente que debéis seguir.
    2. portable: Solo debéis descomprimir el fichero .zip en una ruta que no tenga espacios, y que no cuelgue directamente de C:\, y ya podéis ejecutar la aplicación desde el fichero gvsig-desktop.vbs que hay en dicha carpeta (podéis por ejemplo crear una carpeta “gvsig” en C:\ y dentro de ella dejáis la carpeta de la portable)
  3. Descargar la cartografía desde http://downloads.gvsig.org/download/documents/learning/gvsig-courses/SIG_gestion_municipal_1/Curso_SIG_gestion_municipal-Modulo_3.zip

Nota: Si os sale un error al instalar gvSIG en Windows 10 utilizad la versión portable.

En el módulo 2 tenéis un apartado de preguntas frecuentes resolviendo todas las dudas sobre el curso que nos habéis ido preguntando.

El vídeo-tutorial de este tercer módulo es el siguiente:

 

Post relacionados:

Módulo 1: Diferencias entre SIG y CAD

Módulo 2 Introducción a los Sistemas de Referencia


Filed under: gvSIG Desktop, spanish, training Tagged: ayuntamientos, etiquetado, gestión municipal, simbología
Categories: OSGeo Planet

Paul Ramsey: BC IT Outsourcing 2016/17

OSGeo Planet - Sat, 2017-09-30 17:05

Whoops, it snuck by me in the laze of summer, but the BC Public Accounts have come out, so I can do a (partial) update of my IT outsourcing summary. Why “partial”? Because I cannot include Health Region spending until their vendor spending summaries are released late in the year. So this summary is for central government only.

The year-over-year trend is flat, which means that last year’s steep drop-off of spending on IBM dominates the look of the chart.

The chart by vendor gives a better feel for who is up and who is down:

IBM, up a little year-over-year, but still way down after last years’ collapse. ESIT continues to dominate all vendors by a large margin. Note that ESIT is the new name for HP Advanced Solutions (HPAS) which was itself the new name for the BC operations of EDS.

Maximus is up a little, but with the MSP premium program (and thus the associated administration contract) potentially winding down it’s hard to imagine any long term trend for them but down. At a minimum the 50% cut in premium rates effectively doubles the administrative overhead represented by the Maximum contract, which is not a good look.

One thing I’m going to be looking at once the health numbers are in is whether billings by Cerner move up to compensate for the drop-off by IBM. By rights they should: Cerner has taken over the huge EHR project at PHSA/Coastal. On the other hand, I heard a rumour that much of that spending was shifted out to a “non-profit” entity by the BC Liberals, which would make it disappear from my survey of vendor payments reports.

Categories: OSGeo Planet

gvSIG Team: Camino a gvSIG 2.4: Leyenda de marcadores agrupados

OSGeo Planet - Sat, 2017-09-30 12:11

Presentamos otra novedad de la próxima versión de gvSIG Desktop, especialmente útil cuando queremos visualizar un determinado fenómeno cuya cantidad no podemos determinar únicamente de forma visual. Para ello esta leyenda representa además del elemento mediante un símbolo, la cantidad de veces que sucede en un área determinada y que puede ajustar el usuario.

La leyenda permite representar además del número de fenómenos (cantidad cada x píxeles), cualquier otro atributo que contenga (valor máximo, mínimo, media, sumatorio…). Sin duda, un tipo de leyenda que acaba por completar las ya numerosas posibilidades de simbología de gvSIG Desktop.

Podéis ver cómo funciona en el siguiente vídeo:


Filed under: gvSIG Desktop
Categories: OSGeo Planet

gvSIG Team: Towards gvSIG 2.4: Marker clustering legend

OSGeo Planet - Sat, 2017-09-30 08:12

We present another novelty for the next gvSIG Desktop version, especially useful when we want to visualize a certain element whose quantity can’t be determined only visually. For that, this legend represents the element by means of a symbol as well as the number of occurrences in a certain area, that can be selected by the user.

The legend allows to represent the number of elements (quantity of elements every X pixels) as well as any other attribute that is contained (maximum, minimum, average, summation …). With no doubt, it’s a type of legend that complete the many possibilities of symbology of gvSIG Desktop.

You can see how it works in this video:


Filed under: english, gvSIG Desktop Tagged: legend, Marker clustering, symbology
Categories: OSGeo Planet

PostGIS Development: PostGIS 2.4.0 Released

OSGeo Planet - Sat, 2017-09-30 00:00

The PostGIS development team is pleased to announce the release of PostGIS 2.4.0. Best served with PostgreSQL 10rc1 and pgRouting 2.5.0. See the full list of changes in the news file.

IMPORTANT NOTES

If you are upgrading from an existing PostGIS install, make sure after installing PostGIS binaries to do.

ALTER EXTENSION postgis UPDATE;

— if you have additional postgishy extensions below upgrade them too

ALTER EXTENSION postgis_sfcgal UPDATE; ALTER EXTENSION postgis_topology UPDATE; ALTER EXTENSION postgis_tiger_geocoder UPDATE; ALTER EXTENSION pgrouting UPDATE;

In order to have Map Box Vector Tiles support enabled, you’ll need to compile with protobuf support and pkg-config to verify the correct minimum version of protobuf-c see protobuf for details. ST_FrechetDistance function will not be enabled if PostGIS is compiled with lower than GEOS 3.7.0. GEOS 3.7.0 is not released yet but is expected sometime next month.

Continue Reading by clicking title hyperlink ..
Categories: OSGeo Planet

GeoServer Team: GeoServer 2.12-RC1 Released

OSGeo Planet - Fri, 2017-09-29 21:10

We are happy to announce the release of GeoServer 2.12-RC1. Downloads are available (zipwardmg and exe) along with docs and extensions.

This is a release candidate release of GeoServer made in conjunction with GeoTools 18-RC1.

We want to encourage people to test the release thoroughly and report back any issue found. With no further delay, let’s see what’s new, that is, what is there to test!

Rest API now using Spring MVC

In March, we upgraded the framework used by the GeoServer REST API from Restlet to Spring MVC. All the endpoints should remain unchanged, but they do need testing to ensure there weren’t any unintended side effects.

As part of this upgrade, we also have new REST documentation, providing detailed information about each endpoint.

Thanks again to the code sprint sponsors:

  • Boundless
  • GeoSolutions
  • Astun Technology
  • Gaia3D
  • Insurance Australia Group (IAG)
  • How 2 Map
  • FOSSGIS
  • Atol Conseils et Développements
  • Geodan
WMTS Cascading

Adds the ability to create WMS layers backed by remote WMTS layers, similar to the pre-existing WMS cascading functionality.

See GSIP-162 for more details.

Style Based Layer Groups

Adds the ability to define a listing of layers and styles using a single SLD file, in accordance with the original vision of the SLD specification. This includes a new entry type in the Layer Group layers list, and a new preview mode for the style editor.

See GSIP-161 for more details.

Options for KML Placemark placement

New options for KML encoding have been added, to control the placement of placemark icons, mostly for polygons. The syntax of the new options introduces three new top level format options keys:

&format_options=kmcentroid_contain:true;kmcentroid_samples:10;kmcentroid_clip:true

See GSIP-160 for more details.

GeoWebCache data security API

Add an extension point to GeoWebCache allowing for a security check based on the layer and extent of the tile. Adds an implementation of this extension point to GeoServer’s GWC integration.

This change mostly only affects developers, but will lead to improved security for users in the future.

See GSIP 159 for more details.

NetCDF output support for variable attributes and extra variables

Adds the following to the NetCDF output extension:

  1. An option to allow all attributes to be copied from the source NetCDF/GRIB variable to the target variable.
  2. Support for manual configuration of variable attributes, much like the current support for setting global attributes.
  3. Support for configuration of extra variables which are copied from the NetCDF/GRIB source to the output; initially only scalar variables will be supported. Extra variables can be expanded over “higher” dimensions, that is, values copied from one scalar per ImageMosaic granule are assembled into a multidimensional variable over, for example, time and elevation.

See GSIP 158 for more details.

New labeling features and QGIS compatibility

A number of small new features have been added to labeling to match some of QGIS features, in particular:

  • Kerning is on by default
  • New vendor option to strikethrough text
  • New vendor options to control char and word spacing

../../../_images/charSpacing.png

  • Perpendicular offset now works also for curved labels (previously only supported for straight labels):
  • Labeling the border of polygons as opposed to their centroid when using a LinePlacement (here with repetition and offset):

Along with this work some SLD 1.1 text symbolizer fixes were added in order to better support the new QGIS 3.0 label export, here is an example of a map labeling with background image, as shown in QGIS, and then again in GeoServer using the same data and the exported SLD 1.1 style (click to enlarge):

   

CSS improvements

The CSS styling language and editing UI have seen various improvements. The editor now supports some primitive code completion:

At the language level:

  • Scale dependencies can now also be expressed using the “@sd” variable (scale denominator) and the values can use common suffixes such as k and M to get more readable values, compare for example “[@scale < 1000000]” with “[@sd < 1M]”
  • Color functions have been introduced to match LessCSS functionality, like “Darken”, “Lighten, “Saturate” and so on. The same functions have been made available in all other styling languages.
  • Calling a “env” variable has been made easier, from “env(‘varName’)” to “@varName” (or “@varName(defaultValue)” if you want to provide a default value).

As you probably already know, internally CSS is translated to an equivalent SLD for map rendering purposes. This translation process became 50 times faster over large stylesheets (such as OSM roads, a particularly long and complicated style).

Image mosaic improvements and protocol control

Image mosaic saw several improvements in 2.12.

First, the support for mosaicking images in different coordinate reference systems improved greatly, with several tweaks and correctness fixes. As a noteworthy change, the code can now handle source data crossing the dateline. The following images show the footprints of images before and after the dateline (expressed in two different UTM zones, 60 and 1 respectively) and the result of mosaicking them as rasters (click to get a larger picture of each):

There are more good news for those that handle mosaicks with a lot of super-imposing images taken at different times. If you added interesting information into the mosaic index, such as cloud cover, off-nadir, snow cover and the like, you can now filter and sort over them, in both WMS (viewing) and WCS (downloading) by adding the cql_filter and sortBy KVP parameters.

Here is an example of the same mosaic, the first composite favoring smallest cloud cover, the second one favoring recency instead (click to enlarge):

    

GeoPackage graduation

The GeoPackage store jumped straight from community to core package, in light of its increasing importance.

The WMS/WFS/WPS output formats are still part of community. Currently GeoPackage vector does not support spatial indexes, but stay tuned, it’s cooking!

New community modules

The 2.12 series comes with a few new community modules, in particular:

  • Looking into styling vector tiles and server side using a single language? Look no further than the MBStyle module
  • For those into Earth Observation, there is a new OpenSearch for EO module in the community section
  • Need to store full GeoTiff in Amazon S3? The “S3 support for GeoTiff” module might just be what you’re looking for
  • A new “status-monitoring” community module has been added, providing basic statistics system resource usage. Check out this pull request to follow its progress and merge.

Mind, community modules are not part of the release, but you can find them in the nightly builds instead.

Other assorted improvements

Highlights of this release featured below, for more information please see the release notes (2.12-RC12.12-beta):

  • Users REST uses default role service name as a user/group service name
  • imageio-ext-gdal-bindings-xxx.jar not available in geoserver-2.x.x-gdal-plugin.zip anymore since 2.10
  • REST GET resource metadata – file extension can override format parameter
  • GeoServer macOS picks up system extensions
  • SLD files not deleted when SLD is deleted in web admin
  • Reproject geometries in WMS GetFeatureInfo responses when info_format is GML
  • Include Marlin by default in bin/win/osx downloads, add to war instructions
  • Handle placemark placement when centroid of geometry not contained within
  • Enable usage of viewParams in WPS embedded WFS requests
  • Add GeoJson encoder for complex features
  • Allow image mosaic to refer a GeoServer configured store
  • Duplicate GeoPackage formats in layer preview page
  • ExternalGraphicFactory does not have a general way to reset caches
  • Generating a raster SLD style from template produced a functionally invalid style, now fixed
  • Style Editor Can Create Incorrect External Legend URLs
  • Namespace filtering on capabilities returns all layer groups (including the ones in other workspaces)
Test, test, test!

Now that you know about all the goodies, please go, download and test your favourite ones. Let us know how it went!

About GeoServer 2.12

GeoServer 2.12 is scheduled for October 2017 release.

Categories: OSGeo Planet

OSGeo.nl: Nieuw OSGeo.nl Logo

OSGeo Planet - Fri, 2017-09-29 15:38

Het OSGeo.org Marketing Committee,  voorgezeten door onze eigen Marc Vloemans, is afgelopen maanden druk bezig geweest met een algemene OSGeo.org “Rebranding”. Dit gaat verder dan veranderen van logo: het gaat om een complete vernieuwing van huisstijl, website en en veel meer. Het Nederlandse bedrijf Get Interactive heeft daarbij een groot deel van de uitvoering gedaan. Een en ander is al te zien op de OSGeo.org website.

Als OSGeo.org Lokale Afdeling (Chapter) willen we als OSGeo.nl natuurlijk graag volgen. Gelukkig heeft OSGeo.org zgn “SubBranding” gemakkelijk gemaakt door de design-bestanden te delen via GitHub en een stijlgids te leveren. Daardoor kon Winifred Broeder snel een toepasselijk nieuw logo voor OSGeo.nl maken, waarvoor dank! Zie hieronder en natuurlijk op onze website:

2017 logo OSGeo.nl

Er zal komende tijd nog meer moeten gebeuren, denk aan verdere website updates, banners, visite-kaartjes en andere OSGeo.nl marketing-uitingen. In ieder geval is ons nieuwe logo al op de OSGeo.nl website te zien. Dat doet mij denken dat we nog een vacature hebben in het bestuur voor Marketing en Communicatie. Heb je praktische ervaring met web, media, design en/of “MarCom”? Laat ons weten via bestuur@osgeo.nl.

Categories: OSGeo Planet

Fernando Quadro: Nova turma do Curso de PostGIS Básico

OSGeo Planet - Fri, 2017-09-29 14:55

Neste curso de PostGIS ministrado pela Geocursos você terá uma visão completa do PostGIS, e aprenderá como trabalhar com esta poderosa extensão espacial do banco de dados PostgreSQL.

O curso é voltado para profissionais da área de geoprocessamento, desenvolvimento de software e administradores de bancos de dados, com noções de SIG e linguagem SQL, que estejam em busca de aprender como gerir dados geográficos complexos seja pela necessidade de efetuar análises aprofundadas, seja para a visualização online em tempo real das análises realizadas, utilizando uma base de dados evoluída e de ótima estabilidade.

Veja abaixo a ementa:

1. Instalação do PostgreSQL
2. Instalação do PostGIS
3. Conversão de dados legado utilizando shp2pgsql
4. Construção de tabelas geoespaciais
5. Geometrias
6. “Geografias” (Geography Data Type)
7. Queries geoespaciais
8. Exemplos mundo real
9. Truques e dicas

Para saber mais informações, e realizar a sua inscrição basta acessar o site:

http://www.geocursos.com.br/postgis-basico/

A Geocursos informa que estão abertas as inscrições para o Curso Online de PostGIS Básico que acontecerá entre os dias 11 de Novembro e 02 de Dezembro, aos sábados das 14h00 as 18h00 (Horário de Brasília).

Categories: OSGeo Planet

gvSIG Team: gvSIG 2.4 RC2 is now available to download

OSGeo Planet - Fri, 2017-09-29 13:01

The second gvSIG 2.4 Release Candidate (gvSIG 2.4 RC2) is now available.

We encourage you to test it and send us any errors and suggestions in the users mailing list.

The main new features of this version have been published at the gvSIG blog during the last weeks. Some of them are the possibility to download data from Open Street Map or the access to H2 from gvSIG Desktop.

Thanks for your collaboration.


Filed under: community, english, gvSIG Desktop, testing Tagged: gvSIG 2.4
Categories: OSGeo Planet

gvSIG Team: Ya está disponible gvSIG 2.4 RC2 para descargar

OSGeo Planet - Fri, 2017-09-29 12:54

Ya está disponible gvSIG 2.4 RC2, la segunda distribución candidata a versión (Release Candidate) de gvSIG 2.4.

Os animamos a que la probéis y a que nos reportéis los posibles errores y sugerencias que encontréis a través de la lista de usuarios.

Las principales novedades de esta versión las podéis encontrar en los distintos post publicados en el blog de gvSIG, destacando, entre otras, la descarga de datos de OpenStreetMap o el acceso a las herramientas de administración de H2 desde gvSIG Desktop.

Gracias por vuestra colaboración.

 


Filed under: community, gvSIG Desktop, spanish, testing Tagged: gvSIG 2.4
Categories: OSGeo Planet

From GIS to Remote Sensing: SCP Questions of This Month: September

OSGeo Planet - Fri, 2017-09-29 08:46
This post is a collection of questions and answers about the Semi-Automatic Classification Plugin (SCP) and remote sensing which were discussed in the Facebook group and the Google+ Community this month.
These questions vary from supervised classification technique to software issues, and can be useful to the readers of this blog for solving issues about the use of SCP.

Categories: OSGeo Planet
Syndicate content