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I have a mysql column of linestring type with 2000 linestrings (high water mark values to be more specific). I want to merge them into one multilinestring so i can see what the shape of these values are in MySQL workbench spatial viewer or somewhere else. Is there a mysql function that can...

I am using OpenLayers 2.13.1. I could get my clustering work for the vector layer but when I try adding a styleMap to the vector layer, neither the clusters nor the individual points are visible on the map. Below is my code. function PlotExposuresOnMap(selectedExposures) { if...

I started with basics and did these steps: createdb -U postgres -E UTF8 -O Peete gis -OK createlang -U postgres plpgsql gis (was already installed) -OK psql -U postgres -d gis -f PATH_TO_POSTGRES/share/contrib/postgis-2.1/postgis.sql -OK psql -U postgres -d gis -f PATH_TO_FILE/4326.sql (I...

I want to calculate the zonal statastics from multi band raster for a polygon layer. When I am using this snippet of code: vectorlayer=qgis.utils.iface.mapCanvas().layer(0)rasterfile = qgis.utils.iface.mapCanvas().layer(1).source()zonalstats =...

public static bool AddCodeToDomain(IWorkspace workspace, String domainName, object code, String value) { // Get the requested domain from the workspace. IWorkspaceDomains2 workspaceDomains2 = (IWorkspaceDomains2)workspace; IDomain domain =...

Why my "OpenLayers" not displayed added layer? window.setWMS = function( WMSN ){ window._blockEvents = true; var url = WMSN[0]; var layer = WMSN[1]; var server = WMSN[2]; var wms = new ol.layer.Tile({ source: new ol.source.TileWMS({ url: url...

When connecting to an Oracle Spatial database, QGIS is not consistently populating the list of tables under each schema. When I try to expand a schema (as I have tried to do with PARKING in the picture below), nothing shows. If I can expand a schema whilst the table retrieval is occurring then...

I am attempting to draw a WMS layer consisting of multiple polygons of different colours and an opacity of 0.4. The relevant part of my SLD is colour 0.4 #000000 1 Which draws the layer using the correct colours...

I have recently come across vector road data from the Africa Infrastructure Knowledge Program (http://www.infrastructureafrica.org/documents/list/roads). I found these data helpful for three reasons: 1) They are freely available 2) They cover most sub-saharan countries 3) Information on road...

How can i highlight a point using arcgis api for javascript? When i use the function of centerAndZoom ,I also want to highlight this point,how can i do? أكثر...

QGIS this year split into two branches: Latest release (now 2.10.2) Long term release (now 2.8.2) I am not sure how is it normally in larger companies but I think having (hard)core GIS employees who need to work with OSGeo4W version and GIS users who are fine with standalone version is not...

I have been trying to get my MapServer legend displayed in a GeoExt app using OpenLayers. I am quite new in MapServer and web mapping. Only a vector legend, and my OpenStreetMap legend is displayed. My mapfile: OUTPUTFORMAT NAME png DRIVER 'GD/PNG' MIMETYPE 'image/png' IMAGEMODE...

I have created an OpenLayers.Control.MousePosition: var coord = new OpenLayers.Control.MousePosition({ prefix: 'You are here: ', separator: ' | ', numDigits: 5, emptyString: 'Mouse is not over map.', displayProjection: "EPSG:4326"...

Has anyone had any luck with getting QGIS working on Ubuntu 12.04? I have tried the stable and unstable versions and with not luck. I also get the following: "Some packages could not be installed. This may mean that you haverequested an impossible situation or if you are using the...

Beau Legeer demonstrates how easy it is to work with ENVI image analysis capabilities in the cloud. In this particular demo, ENVI’s powerful analysis tools are accessed through a simple web browser interface. أكثر...

2015-07-24 09:33:39 | Jack Dangermond, president en oprichter van Esri, reikte gisteren de Special Achievement in GIS Award (SAG) persoonlijk uit aan Johan Reefman van h أكثر...

2015-07-24 09:27:56 | Op 30 september 2015 vindt bij de Rijksdienst voor het Cultureel Erfgoed Amersfoort het Geo Gebruikers Festival plaats. أكثر...

2015-07-24 09:24:28 | Vanaf 1 mei 2015 zijn er nieuwe versies van kracht voor de Nederlandse profielen voor WMS en WFS. أكثر...

When Landsat 8 imagery was made available on Amazon AWS our first question was: ‘how easy will it be to view it in Google Earth?’. This is our experience trying to answer that question. The Landsat 8 satellite has a number of different cameras that capture imagery in different wavelengths. For...

Bonjour les gars. Pouvez-vous m'aider à résoudre ce problème : Sur un fond de carte des USA, je veux ressortir les villes de plus de 50 mill habitants dans un rayon de 500km autour d'Atlanta. J'ai essayé avec différents système de projection, mais j'obtiens des cartes applaties. Et quand la...