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I am attempting to insert a geometry into a table using the st_geomfromgml function. The GML is being sourced from a Geoserver WFS request. The function call looks like this st_geomfromgml(' 146.48296 -18.6222 146.48296 -18.6222'); This worked on PostGIS version POSTGIS="1.5.3"...

What is the structure of Standard Interchange Format(SIF) used by navteq and other spatial data providers? Any documentation/sample files? Is there a SIF parser available in C/C++/Java/PHP ? أكثر...

Is there a way to use the Time Slider on multiple data frames simultaneously? Example: My Dataframe 1 shows precipitation values over an area and DataFrame 2 shows corresponding temperature.. I want to be able to use the slider to advance both DFrames at once. Right now only the 'activated'...

Although I love slinging some python to create geoprocessing scripts/services, I was under the impression that using ArcObjects to do the equivalent operation(s) will have better performance. I've made one (or two) posts over the past couple of days regarding my woes with getting geoprocessing...

I am using a GP task to print my map and its legend. Well it works fine. But it is really slow. Also I am not able to print the route event layer that I create. It does not show on the map. Please suggest me an efficient way of printing the map from client side. I am using ArcGIS 10 Server...

A kind of branching of this question. Soon I will need to handle GML Coordinate Reference Sysyem definitions in a Java servlet. Links: GML OGC reference. Concrete example. I know that GeoTools library can parse GML, and I can see in...

OpenLayers: WFS request to GeoServer to retrieve "name" & "featureNS" Using WFSGetCapabilities I sent a GetCapabilities request to GeoServer. From the result of WFSGetCapabilities().read(), I can loop each featureType and retrieve some basic info(e.g., name, title, featureNS, srsName). Then in...

I'm using Open Street Map and its vectorial road network and I'd like to implement a map matcher algorithm. Currently I'm able, for each GPS position, to retrieve the nearest road segment and calculate the projection of this position to that segment, like on this image (Red pin is the pure GPS...

Bonjour à tous, Je travaille sous QGIS 2.10 et j'ai lancé le module GRASS, j'aimerais intégré les couches SIG créées avec, grâce à ce module dans QGIS, mais je n'ai pas l'onglet "Parcourir" comme dans les anciennes versions de QGIS... Est-ce normal ? Ou est-ce un bug ? Ou moi qui suis...

Esri has recently published a book entitled, Making Spatial Decisions Using GIS and Lidar. The scenarios in this reference feature lidar as the primary data source and lidar-related analysis as the... Click Title to Continue Reading... أكثر...

creating shapefile from a table based on "county name" filed, while there are multipl I have Arcgis10.1. I am trying to make shapefile out of an excel sheet that has county level data. I cant join this data based on the 'county' field to a county shapefile because I have multiple records in the...

Does gdal_rasterize have the equivalent of a "snap raster" setting from ArcGIS? The question says it all really. I need my output raster from gdal_rasterize to align (perfectly) at the pixel level with another pre-existing raster. Does anyone know how to manipulate the function to do this...

I created mesh file using OpenDroneMap program out of 100 geotaged jpgs, and i would like to know for a way for generating raster image out of this .ply file?Has anyone done this?Mashlab has the option to make a screenshot but it returns very poor quality image.I saw that Agisoft Photoscan has...

How can I get started with creating a map with elevation just like this one: Basically I need a map that looks like the one above. Can someone tell me where can I get the data, and how do I process them with QGIS? Do I need a raster geotif and then use GDAL? أكثر...

I'm trying to use PostGIS to do a 'union' of polygons. When I Googled "PostGIS Union", I found the ST_Union function, which performs what I would call a 'dissolve,' not a Union. What I actually want to do is what GRASS refers to as an "Overlay" with the "OR" operator, or QGIS/ArcGIS just simply...

I use GeoServer where I created an ImageMosaic storage following this manual.When I create new datastore, all *.tif files are indexed into DB (PostgreSQL with PostGIS). How can I create new index in DB, when I put new geotiff into my data folder, or reindex all geotiff files in DB? My config...

I have three series (or tables) of points in PostGIS which I want to compare. I would like to know how "close" each series is when compared to the other two. In other words I would need some measure such as the average of the average distance of each point with all the others (that is, the...

I'm trying to implement an open-source NITF reader (using only java, no external libraries such as GDAL or NITRO), and its mostly going OK. However I'm having trouble understanding the RPF extensions, in particular the attributes in the RPFDES TRE. I know that they are documented in...

I have (multi)linestrings containing upwards of 5000 points and I want to perform two simplifications possibly using Ramer Douglas Peucker or alternative methods in PostGis The (multi)linestrings consist of straight lines, 90 degree curves, 180 degree curves and loops (circles) I understand...

I need a guide how to use this plugin properly, I'm a newbie on PostGIS and I'm trying to use the linear referencing plugin of QGIS. I've created a database on postgreSQL with the postGIS extension and on QGIS with the Spit plugin I created a new connection with that DB. But, it generated some...