OSGeo Planet

gvSIG Team: 13th International gvSIG Conference: New proposal deadline

OSGeo Planet - Thu, 2017-08-03 08:42

The deadline for submitting communication proposals for 13th International gvSIG Conference has been extended because of the public holidays in several countries. The new deadline is September 7th.

The 13th International gvSIG Conference will take place at School of Engineering in Geodesy, Cartography and Surveying (Universitat Politècnica de València, Spain) from October 18th to 20th.

We encourage you to participate, not only as participant but also presenting your projects about gvSIG. You can find all the information about how to send them in the event website.

In September we will inform you about the workshops of the conference at the gvSIG Blog.

We expect your participation!

Filed under: english, events Tagged: 13th gvSIG Conference
Categories: OSGeo Planet

gvSIG Team: 13as Jornadas Internacionales gvSIG: Ampliación del plazo de envío de comunicaciones

OSGeo Planet - Thu, 2017-08-03 08:13

Se ha ampliado el plazo de envío de resúmenes para las 13as Jornadas Internacionales gvSIG, que con motivo del periodo vacacional en algunos países se prolonga un mes, siendo la nueva fecha límite el día 7 de septiembre.

Las jornadas se celebrarán del 18 al 20 de octubre en la Escuela Técnica Superior de Ingeniería Geodésica, Cartográfica y Topográfica (Universitat Politècnica de València, España).

Os animamos a participar no solo como asistentes, sino como ponentes, presentando vuestros trabajos realizados sobre gvSIG. Toda la información sobre el envío de comunicaciones podéis encontrarla en la web del evento.

Durante el mes de septiembre se irá publicando toda la información sobre los talleres que tendrán lugar en las jornadas en el blog de gvSIG.

¡Os esperamos!


Filed under: events, spanish, training Tagged: 13as Jornadas gvSIG
Categories: OSGeo Planet

gvSIG Team: Towards gvSIG 2.4: H2GIS, increasing the gvSIG Desktop potential

OSGeo Planet - Thu, 2017-08-03 08:11

The next gvSIG Desktop version has a lot of novelties related to databases, but the most interesting that increases the existing tools is the H2GIS support, the H2 spatial engine.

H2 is a light Java database, very easy to use, that is included in gvSIG Desktop directly, so any installation is required.

Just as Spatialite it’s based on files, so distributing an H2 database is as much easy as sharing a concrete file.

One of the main advantages is to access to the own H2 administration tools from gvSIG Desktop, so we can perform any of the H2 operations allowed by H2GIS.

Something as much easy as creating an spatial index on an H2 table (or linked tables) multiplies its performance considerably.

Besides we can work from the H2 administration tool, not only with H2 tables but with any layer (for example a shapefile) that we have linked with the database.

Here you have a video where we export a shapefile to an H2 database, and we perform some easy spatial operations later (selection of elements by attribute and creation of a new layer), and finally linking a shapefile with the database. Besides we show you the H2GIS website where you can see examples of SQL queries for any type of spatial operations.

You have a new world of possibilities to discover in gvSIG Desktop!

Filed under: english, gvSIG Desktop, testing Tagged: geodb, gvSIG-2.4, H2, H2GIS
Categories: OSGeo Planet

gvSIG Team: Camino a gvSIG 2.4: H2GIS, multiplicando el potencial de gvSIG Desktop

OSGeo Planet - Wed, 2017-08-02 11:11

La próxima versión de gvSIG Desktop viene cargada de novedades relacionadas con bases de datos, pero de todas ellas quizá la que abre más posibilidades es el soporte de H2GIS, el motor espacial de H2.

H2 es una base de datos Java ligera, muy fácil de usar y que en nuestro caso va directamente incluida en gvSIG Desktop, por lo que no requiere ninguna instalación.

Al igual que ocurre con Spatialite se basa en ficheros, por lo que distribuir una base de datos de H2 es tan sencillo como compartir un determinado fichero.

Entre sus ventajas se encuentra el acceso a las propias herramientas de administración de H2 desde gvSIG Desktop, con lo que utilizando el lenguaje SQL podemos realizar cualquier operación de las muchas que permite H2GIS.

Algo tan sencillo como crear un índice espacial sobre una tabla de H2 (o capas enlazadas) multiplica considerablemente su rendimiento.

Además podemos trabajar desde la herramienta de administración de H2 no sólo con tablas de H2 sino con cualquier capa (por ejemplo un shape) que hayamos enlazado con la base de datos.

Os dejamos con un vídeo en el que exportamos un shape a una base de datos H2GIS, para posteriormente realizar unas sencillas operaciones espaciales (selección de elementos por un atributo y creación de una capa nueva), y por último enlazar un shapefile con la base de datos. Además os mostramos la web de H2GIS donde podéis ver ejemplos de sentencias de SQL para todo tipo de operaciones espaciales.

¡Ya tenéis todo un nuevo mundo de posibilidades para descubrir con gvSIG Desktop!

Filed under: gvSIG Desktop, spanish Tagged: geodb, gvSIG-2.4, H2, H2GIS
Categories: OSGeo Planet

BostonGIS: Code Sprint in Boston after FOSS4G 2017

OSGeo Planet - Tue, 2017-08-01 21:22
Reminder: Right after the Free and Open Source GIS conference in Boston is the OSGeo / LocationTech code sprint on Saturday August 19th 9AM-5PM at District Hall where project members from various Open Source Geospatial projects will be fleshing out ideas, documenting, coding, and introducing new folks to open source development. All are welcome including those who are unable to make the conference.

We are getting a final head-count this week to plan for food arrangements. If you are planning to attend, add your name to the list https://wiki.osgeo.org/wiki/FOSS4G_2017_Code_Sprint#Registered_Attendees. If you are unable to add your name to the list, feel free to send Regina an email at lr@pcorp.us with your name and projects you are interested in so I can add you to the list. Looking forward to hanging out with folks interested in PostgreSQL and PostGIS development.

District Hall is a gorgeous community space. Check out the District Hall View http://bit.ly/2f61J8c

Categories: OSGeo Planet

Jackie Ng: Announcing: mapguide-react-layout 0.9.6

OSGeo Planet - Tue, 2017-08-01 16:11
This is a quick release to make the awesome new layer transparency sliders in the previous release not break down when used on a map that doesn't actually have external base layers (OSM, Bing, etc)

Project Home Page
mapguide-react-layout on npm
Categories: OSGeo Planet

gvSIG Team: Learn GIS for free: The complete course

OSGeo Planet - Tue, 2017-08-01 07:42

In this post you can find a link compilation of “Learn GIS for free” course. A complete course to map your data with open source GIS: explore GIS tools, learn concepts and terminology of spatial analysis, learn how to analyze data, symbolize data and make your own maps, how to work with projections, vectorial and raster data, etc.

The course is recommended to everyone who hasn’t worked on GIS and want to introduce to this type of technologies, as well as users that have knowledge about it already and want to increase it.

The course is made on gvSIG 2.1 version, and currently the last version is gvSIG 2.3.1 (we are working on the new 2.4 version already). We recommend you to use the last version published because it will have all the functionalities of the previous versions… and several improvements too.

gvSIG Desktop is completely free to download, use and share.

It’s usual to have doubts when you follow the course. If you want to solve them you can use the users mailing list, available at this link: http://www.gvsig.com/en/community/mailing-lists

To follow the course you need:

Link compilation:

Filed under: english, Geopaparazzi, gvSIG Desktop, training Tagged: course, free, gis, open source, tutorial, video
Categories: OSGeo Planet

gvSIG Team: Towards gvSIG 2.4: Improvements in the toolbars usability

OSGeo Planet - Tue, 2017-08-01 07:33

One of the requests at the last gvSIG Desktop versions was the related to the improvement of the toolbars usability, where if new actions were executed (activating a layer, start editing mode…) the situation of the main buttons changed, making it difficult to find them by the user. For example, when a vector layer was activated, the “Add layer” button was moved to the right side, and depending on the screen resolution it could moved to the second line of toolbars.

At 2.4 version, the usability of that part has been improved, locating the toolbars in this logical order: Actions on the project, adding layers, zooms, attribute table, information tools, selecting tools, editing tools…

We expect that it makes your work easy.

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

Ian Turton's Blog: Calculating the area of a polygon

OSGeo Planet - Tue, 2017-08-01 00:00

One of the recurring questions on GIS stackexchange is “What units is the area calculated by JTS getArea()”. It doesn’t seem to matter how many times people say that these is no answer to this as it depends on the projection of your data. The question will not die, so I cooked up some code that should give a close-ish answer for most polygons.

As with most of these questions the trick is to convert your polygon to a flat cartesian plane (this is where JTS works best). We can use the GeoTools auto projection (assuming the polygon is small enough) and then simply call .getArea() method.

private Measure<Double, Area> calcArea(SimpleFeature feature) { Polygon p = (Polygon) feature.getDefaultGeometry(); Point centroid = p.getCentroid(); try { String code = "AUTO:42001," + centroid.getX() + "," + centroid.getY(); CoordinateReferenceSystem auto = CRS.decode(code); MathTransform transform = CRS.findMathTransform(DefaultGeographicCRS.WGS84, auto); Polygon projed = (Polygon) JTS.transform(p, transform); return Measure.valueOf(projed.getArea(), SI.SQUARE_METRE); } catch (MismatchedDimensionException | TransformException | FactoryException e) { // TODO Auto-generated catch block e.printStackTrace(); } return Measure.valueOf(0.0, SI.SQUARE_METRE); }

Note how I have returned a Measure instead of a raw double, so now any one using the method “knows” automatically that the answer is an area and it is in square metres.

This is also handy if you want to display your result in another unit:

Measure<Double, Area> a = me.calcArea(feature); System.out.println(a); System.out.println(a.to(NonSI.HECTARE)); Unit<Area> sq_km = (Unit<Area>) SI.KILOMETER.pow(2); System.out.println(a.to(sq_km)); Unit<Area> sq_mile = (Unit<Area>) NonSI.MILE.times(NonSI.MILE); System.out.println(a.to(sq_mile)); Unit<Area> acre = (Unit<Area>) NonSI.MILE.divide(8.0).times(NonSI.FOOT).times(66.0); UnitFormat.getInstance().label(acre, "acre"); System.out.println(a.to(acre));

Produces this expected output, where we can use predefined units like Hectare (and the less common Are) and define our own units like kilometre squared and acre. According to QGIS identify it should be 103,888.317 km² for a large polygon.

1.025113765431267E11 m² 102511.3765431267 km² 39579.86375845866 mi² 1.025113765431267E7 ha 2.5331112805413544E7 acre

For a smaller polygon I get 46.833 ha in QGIS and 46.901 ha which is close enough for most problems.

Categories: OSGeo Planet

GeoServer Team: GeoServer 2.11.2 released

OSGeo Planet - Mon, 2017-07-31 17:56

We are happy to announce the release of GeoServer 2.11.2. Downloads are available (zipwardmg and exe) along with documentation and extensions.

GeoServer 2.11.1 is the latest stable release of GeoSever recommended for production system. This release is made in conjunction with GeoTools 17.1.

Highlights of this release are featured below, for more information please see the release notes ( | 2.11-RC1 | 2.11-beta ).

New Features and Improvements
  • There is a new GetLegendGraphic option that will return feature counts in the legend label, counting them in the current bounding box
  • Geometries in GetFeatureInfo GML output are now reprojected following the base GetMap output projection
  • The LayerGroup edit page allows configuring keywords and identifiers (as already available for normal layers)
Bug Fixes
  • Various raster improvements, including better handling of heterogeneous CRS mosaics, lower pixelation at high latitudes in EPSG:3857,
  • GetLegendGraphic against multiple layers did not work if any layer was out of scale range, fixed
  • GetFeatureInfo now works against a mix of queriable and non queriable layers
  • Cascading WMS now supports very long credentials
  • Several fixes and tweaks in the configuration UI for an improved experience
  • And several more, check the release notes for full details
About GeoServer 2.11

Articles, docs, blog posts and presentations:

  • OAuth2 for GeoServer (GeoSolutions)
  • YSLD has graduated and is now available for download as a supported extension
  • Vector tiles has graduate and is now available for download as an extension
  • The rendering engine continues to improve with underlying labels now available as a vendor option
  • A new “opaque container” layer group mode can be used to publish a basemap while completely restricting access to the individual layers.
  • Layer group security restrictions are now available
  • Latest in performance optimizations in GeoServer (GeoSolutions)
  • Improved lookup of EPSG codes allows GeoServer to automatically match EPSG codes making shapefiles easier to import into a database (or publish individually).
Categories: OSGeo Planet

GeoTools Team: GeoTools 17.2 released

OSGeo Planet - Mon, 2017-07-31 17:51
The GeoTools team is pleased to announce the release of GeoTools 17.2:This release is also available from our maven repository.

This release is made in conjunction with GeoServer 2.11.2.

GeoTools 17.1  is the latest stable release of the 17.x series and is recommended for all new projects.Improvements
  • Exposing min/max variable values out of NetCDF (for statistics and rendering usage)
  • JAI-EXT has been updated to 1.0.15 and extra work has been put to ensure NODATA is properly processed across the various operations
  • The matchCase property for Filter 2.0 is now handled by the gt-xsd-filter module
  • Generic geometry support in the "fast" GML encoding path
  • Lots of improvements in the raster rendering, including optimized band selection, fixes to crop usage in advanced projection handling, improved handling of ROIs in mosaicked images, dateline crossing, warping and heterogeneous CRS mosaic.
  • Better sizing and positioning of label shields when using automatic resizing
  • App-schema connection handling improvements, now uses only one JDBC connection per data access
And more! For more information please see the release notes (17.217.1 | 17.0 | 17-RC1 | 17-beta).About GeoTools 17
  • The wfs-ng module is now a drop in replacement and will be replacing gt-wfs
  • The NetCDF module now uses NetCDF-Java 4.6.6
  • The AbstractDataStore has finally been removed, please transition any custom DataStore implementations to ContentDataStore (tutorial available).
Categories: OSGeo Planet

gvSIG Team: Camino a gvSIG 2.4: Mejora en la usabilidad de las barras de herramientas

OSGeo Planet - Mon, 2017-07-31 12:34

Una de las demandas en las últimas versiones de gvSIG Desktop era la de mejorar la usabilidad de las barras de herramientas, donde a medida que se ejecutaban nuevas acciones (poner activa una capa, ponerla en edición…) la situación de los principales botones iba cambiando, dificultando su localización al usuario. Por ejemplo cuando se ponía activa una capa vectorial, el botón de “Añadir capa” se situaba hacia la derecha de la página, y dependiendo de la resolución de pantalla podía pasar incluso a la siguiente línea.

En la versión 2.4 se ha mejorado la usabilidad en esta parte, situando las barras de herramientas en el siguiente orden lógico: Acciones sobre el proyecto, añadir capas, zooms, tabla de atributos, herramientas de información, herramientas de selección, herramientas de edición…

Esperamos que os facilite así el trabajo.

Filed under: gvSIG Desktop, spanish, testing Tagged: barras de herramientas, gvSIG 2.4, usabilidad
Categories: OSGeo Planet

gvSIG Team: Criação do Grupo GeoForAll Iberoamérica

OSGeo Planet - Mon, 2017-07-31 06:26

Da Associação gvSIG, sendo envolvido na criação desta comunidade, queremos repetir nosso blog o anúncio oficial:

Temos o prazer de anunciar a criação do Grupo GeoForAll Iberoamérica. Este grupo é resultado da fusão de Grupo Regional para América do Sul e do Grupo Temático para Hispanohablantes de GeoForAll.

Os coordenadores deste novo grupo são Silvana Camboim (Brasil), Antoni Pérez Navarro (Espanha) e Sergio Acosta y Lara (Uruguai), que agora são as referências de contato para qualquer laboratório na América Latina e Caribe, Espanha e Portugal, que queira a aderir à iniciativa.

A lista de e-mail será o meio de contato inicial para todos os novos membros. Todos os membros da região da América Latina podem usar a lista para ajudar a construir ou propostas concretas sobre questões específicas e sugerir ideias para desenvolver. Ele também servirá para divulgar oportunidades de financiamento possíveis eventos FOSS4G regionais, locais ou regionais, etc.

Nossos objetivos são:

  • tornar a educação e oportunidades geoespaciais acessíveis a todos;
  • criar oportunidades para pesquisa e ensino em Ciência Geoespacial Aberta;
  • construir uma infraestrutura global e aberta para ensino e pesquisa;
  • estabelecer parcerias entre academia, governo e indústria em torno da ciência e da educação geoespacial aberta.

Uma das primeiras iniciativas do grupo é ter uma série de seminários online (webinars) em Espanhol e Português, tendo planejado a primeira ( “Geomática livre para a gestão municipal. A suíte gvSIG e casos de uso “) em meados de setembro.

Convidamos você a se juntar a esta iniciativa entrando em contato qualquer um dos coordenadores ou diretamente através da lista de discussão. Todas e todos são bem-vindos.”

Filed under: portuguese, press office
Categories: OSGeo Planet

BostonGIS: Using OSGeoLive with VirtualBox

OSGeo Planet - Sat, 2017-07-29 07:55

FOSS4G 2017 is just a few weeks away. Many of the workshops will utilize OSGeoLive as a means for workshop participants to get up and running quickly with OSGeo Free and Open Source GIS tools and Boston data. OSGeoLive11 is a LUbuntu 16.04 distribution. OSGeoLive11 is going thru the final stages of prep. You can download the OSGeoLiveRC1 ISO for it from http://aiolos.survey.ntua.gr/gisvm/11.0/osgeo-live-11.0rc1-amd64.iso.

Once OSGeoLive11 is fully prepped, it will be linked on the osgeolive site http://live.osgeo.org. If you want to run OSGeoLive11 from bootable media, you can burn the ISO to DVD or thumb drive and boot. In final prep, you can expect to have a Virtual Image ready to go you can host on Virtual Box or VMWare and make further customizations. OSGeoLive11 thumb drives will be handed out at the conference.

If you are doing any PostgreSQL/ PostGIS / pgRouting / or other GIS training, OSGeoLive is pretty handy. OSGeoLive11 contains PostgreSQL 9.5 (I know slightly dated) , PostGIS 2.3.2 and cli tools, pgRouting 2.4.1, and osm2pgrouting 2.2.0. In addition it contains popular GIS Desktop friends QGIS, OpenJump, gvSig, uDig as well as power tools like GRASS, R, GDAL CLI toolkit, and Jupyter notebooks. Mapping Servers MapServer and GeoServer. We'll be using pgRouting, osm2pgRouting, PostGIS, PostgreSQL, QGIS, and OpenJump in our workshop Problem Solving with pgRouting. A good chunk of FOSS GIS relies on PostgreSQL via PostGIS so you'll find a lot of already setup PostgreSQL databases on this disk.

For this set of exercises, we're going to go thru using the ISO media linked above on a Windows 7 VirtualBox setup. If you are using any other OS (e.g. Mac OSX, Linux, Unix), instructions should be much the same.

Continue reading "Using OSGeoLive with VirtualBox"
Categories: OSGeo Planet

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

OSGeo Planet - Fri, 2017-07-28 08:00
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

gvSIG Team: New GeoForAll Regional Group for Iberoamerica

OSGeo Planet - Fri, 2017-07-28 07:59

From the gvSIG Association, we are involved in the creation of this community, so we want to repeat in our blog the official announcement:

We are very pleased to announce the new GeoForAll Regional Group for Iberoamerica. This is due to the merger of the Regional Group for South America and the GeoForAll Spanish-Speaking Group.

The chairs of this new group are Silvana Camboim (Brazil), Antoni Pérez Navarro (Spain) and Sergio Acosta and Lara (Uruguay) and are now the contact points for any new labs to be established in Latin America & the Caribbean, Spain and Portugal.

The list becomes the first point of contact for the new members. All regional members in the group can use the list for collaborating on regional funding calls, FOSS4G local conferences, etc.

Our goals are:

  • to make education and geospatial opportunities accessible to all.
  • To create research and teaching opportunities in open geospatial science
  • to build global open access teaching and research infrastructure
  • to establish collaborations between academia, government and industry around open geospatial science and education

One of the first activities of the group will be to start a series of webinars in both Spanish and Portuguese, the first of them (“Free Geomatics for Municipal Management; the gvSIG suite, use cases “) to be hold by mid-September.

We invite you to join this initiative by contacting any of the chairs or directly through the mailing list. You are all welcome.

Filed under: english, press office
Categories: OSGeo Planet

gvSIG Team: Nace el Grupo GeoForAll Iberoamérica

OSGeo Planet - Fri, 2017-07-28 07:45

Desde la Asociación gvSIG, que estamos participado en la creación de esta comunidad, queremos hacernos eco en nuestro blog del anuncio oficial de presentación del mismo:

Nos es muy grato anunciar la creación del Grupo GeoForAll Iberoamérica. El mismo surge de la fusión del Grupo Regional para Sudamérica y el Grupo Temático para Hispanohablantes de GeoForAll.

Los coordinadores de este nuevo grupo son Silvana Camboim (Brasil), Antoni Pérez Navarro (España) y Sergio Acosta y Lara (Uruguay) los que son ahora los referentes de contacto para cualquier laboratorio de Latinoamérica y el Caribe, España y Portugal, que quiera sumarse a la iniciativa.

La lista de correo será el medio de contacto inicial para todo nuevo miembro. Todos los miembros de la región iberoamericana pueden usar la lista para colaborar en la construcción de propuestas en temas concretos o específicos, así como sugerir ideas a desarrollar. Servirá también para difundir posibles oportunidades regionales de financiamiento, eventos locales o regionales FOSS4G, etc.

Nuestros objetivos son:

  • hacer que la educación y las oportunidades geoespaciales sean accesibles a todas y todos.
  • crear oportunidades de investigación y enseñanza en ciencia geoespacial abierta
  • construir una infraestructura global y abierta para la enseñanza y la investigación
  • establecer colaboraciones entre la academia, el gobierno y la industria en torno a la ciencia y la educación geoespacial abierta

Una de las primeras iniciativas del grupo es la de contar con una serie de seminarios en línea (webinars) tanto en español como en portugués, teniendo previsto realizar el primero de ellos (“Geomática libre para gestión municipal. La suite gvSIG y casos de uso“) a mediados de setiembre.

Los invitamos a sumarse a esta iniciativa poniéndose en contacto con cualquiera de los coordinadores o directamente a través de la lista de correo. Sean todas y todos bienvenidos.

Filed under: press office, spanish
Categories: OSGeo Planet

Fernando Quadro: Usando open data para monitoramento em tempo real

OSGeo Planet - Thu, 2017-07-27 18:11

A tendência em TI é atualmente dominada por termos como “Big Data”, “Real-Time”, “Fast Data”, “Smart Data”… e em SIG não é uma exceção, já que hoje toneladas de dados podem ser georreferenciadas. Como a quantidade de dados disponíveis está crescendo e se tornando cada vez maior, há mais e mais agências (muitas vezes públicas) que colocam seus dados gratuitamente em portais de Dados abertos para análise de dados de crowdsource. Esses dados, por sua vez, tornam-se “pão com manteiga” para entusiastas SIG em suas aplicações.

Daniel Demonceau, que está vivendo em Sydney, encontrou o Portal de Dados Abertos de Transporte Público.

Além de todos os dados estáticos, existe uma API Web que transmite a posição em tempo real dos veículos da companhia de transporte como os trens, ônibus, balsas e trilhos leves. Esta API particularmente chamou atenção pela possibilidade de explorá-la para exibir os ferries em um mapa usando exclusivamente tecnologias Open Source GIS. O produto final deste desenvolvimento parece assim (uma posição a cada 10 segundos):

Para reproduzir o case, seguem os passos:

– Prepare o modelo de banco de dados para armazenar os dados recebidos (PostGIS)
– Desenvolva um script que reúna as últimas posições disponíveis e atualize o banco de dados (Python)
– Exponha os dados através de um Servidor de maps (GeoServer)
– Consumima os serviços WMS para exibir os dados em um mapa (OpenLayers)

Depois de um dia inteiro de recebimento de posições de rastreamento para todas as balsas, temos um total de 129.446 posições no banco de dados. Uma métrica interessante que pode ser feita é calcular a distância total percorrida por cada ferry por dia.

Todos os códigos podem ser encontrados no github e você pode acessar também um tutorial completo explicando como reproduzir este case.

Fonte: LinkedIn

Categories: OSGeo Planet
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