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I am using some polygons and rasters whose initial extents cover all of Canada or all of North America. I am interested in a small area in Ontario that is in UTM zone 18. I would like to use the UTM 18 projection for this project. If I convert all of my layers into WGS84 UTM 18 using ArcGIS...

I am working on an rainfall analysis and I have to interpolate some datas with kriging method. Is co-kriging suitable for the rainfall analysis? أكثر...

I have a layer that has nested polygons in them. I want to aggregate the polygons. I do this using the Union function. I use the "No Gaps" option when I perform the union. However, when I overlay my unioned layer on top of the original, I can see small gaps in the polygon. We also thought...

I’m running ArcGIS Server 9.3.1 on a Windows Server 2008 virtual machine. I noticed the other day that my C:\ drive was almost full. I tracked the issue down to this location “C:\Users\ArcGISSOC\AppData\Local\Temp” on the server. There are some .mem files that are written everytime a service...

In a leaflet application, I have a base map, and several overlay layers, each of which are showing GeoJSON. The GeoJSON is going update (client receives over a websocket) at 4Hz. The GeoJSON consists of a good number of polylines. The area covered is pretty small, so I don't think that...

I am looking to convert a .DEM exported from AutoCad to a floating point raster file type (.FLT) utilizing QGIS to implement in HEC-RAS Mapper. This is accomplished easily in Arc using the Raster>Float option. Referencing ESRI Supported Formats it does not appear the .FLT format is...

Sitting atop the Andes plateau on the border between Peru and Bolivia, the lake is the highest major body of navigable water in the world and the largest lake in South America. أكثر...

This question already has an answer here: Using Collect Values Tool with Union in ModelBuilder? 1 answer How do you feed the outputs of an ITERATE tool (e.g. three buffers) to an INTERSECT...

I would like to feed a list of feature classes (only one polygon per feature class, but up to 150 feature classes) into the Union tool in ModelBuilder by using a Feature Class Iterator and the Collect Values Tool. Unfortunately, it does not work since "Collect Values" only works with Merge...

Design Map with ArcMap 10.2 أكثر...

How does one differentiates from the other? Why when used as interpolation method the surfaces from each method are different? What does the parameters mean? أكثر...

I am a german student and study Geoinformatik. I have the task to store Raster data in SQLite. Is it possible to show and work with a image from the database in QGIS? Are there any Tutorials or is it possible? أكثر...

I have a Feature layer that does not display symbols consistently. Symbols at certain locations are randomly not be visible. Zooming in-out will randomly show/hide a symbol at a particular location but display symbols at other locations consistently, within the same visible extent. It is not...

I want to cache my raster data(large geotiff files) on local database. I thought to use spatialite. I found librasterlite which provide functionality to do that. Can anybody point to some tutorial on it. Or is there any other alternative. Programming environment - C++ I want to store...

Data: Raw OSM data (.osm XML file). Target: Connect between house number represented by node, to street name represented by way. What I did: In www.openstreetmap.org I can explore elements. So I point the node representing house number: Then I searched by it's osm_id and found: Then...

On one side the result is "bleeding" over the vector on the other side its more than one raster pixel from the vector on the inside. How to correct this? http://i.imgur.com/d0v6mqt.png http://i.imgur.com/UKoEepJ.png أكثر...

I am trying to find a tool to create a skeleton of a large vector dataset using QGIS and its bundle. It should be directly programmatically callable through Python or commandline (QGIS, GRASS, OGR etc. are all okay). The target is a large thin polygon with holes representing street areas and I...

Giving form to Geoinformation by*Mladen Stojic, President, Hexagon Geospatial أكثر...

How do I convert a particular point on a mercator map (points in a mercator map svg) to WGS84 coordinates? Is it simply a direct translation of the x,y values, using a multiplier which matches the map width & height to -180..180 and -90..90? أكثر...

I'm quite new to geotools and I'm trying to get to grips with it.Trying to load some shapefiles (see attachment) into a MapContent which in turn is associated with a SwtMapPane I always get an exception that suggests that there's something wrong with the current CRS of the map...