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I want to learn how to use any tools in Calculator for GIS. I know use to +/*- but i cant use to such as ( Sin, Tan ) and alle tools.. Can you hellp me? أكثر...

Bonjour, J'utilise le programme QGIS régulièrement et pour une raison inexpliquée je n'arrive plus à ouvrir le programme (voir message ci dessous). Dans l'attente d'une aide, Merci Impossible de charger qgis.user. Le support Python va être désactivé. أكثر...

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What is the best tool on the market for converting Smallworld data into a variety of other GIS formats? We have a number of Smallworld instances and need to create a central repository for the data that can be used by a mobile application. أكثر...

I am trying to analyze the urban form of a city. I don't have the polygon file for streets, so I must derive block structure from parcel data (see image below). What tool could I use to accomplish this? I've tried running dissolve in QGIS, but that has been running overnight and I'm not sure...

I understand how to work with color tables within GRASS - but is there any way to preserve color tables when opening the raster in a different program? For example, I created a color table in GRASS that is very detailed (certain number ranges get certain colors), but then when I open the file...

Does an equivalent of ArcScripts exist? I know of the the ArcGIS resource center and "Code Galleries" but does something that equates to ArcScripts where users share useful ArcGIS code exist? The new ArcGIS forums are not great for searching for code either. It seems to me as through the ESRI...

GeoServer WMS OGC-filter fails with "I dont understand the tag: gml:Polygon" I'm trying to construct an OGC filter to pass to a WMS GetMap request to GeoServer but I can't seem to do it. The goal is to show the parts of the layer that intersects with a supplied polygon. When I run the query...

I was pleasantly surprised to find very much enlarged filter support in QGIS-Dev (1.9.0_Master). One application would be a WFS-Filter which combines $geometry and Intersect in order to load only the data from WFS which would be visible in the actual extent. Something like this: intersects(...

I have downloaded data from the USGS to create a Map for a malaria risk in east africa but my question is only about the actuall Input in the Raster Calculator. I have a RFE Tiff that shows the Rainfall in the Area, the highest rainfall is within the value of 76 to 150 so I used the following...

I originally had a DEM .tif raster in Decimal degrees. I projected it into a PCS with the spatial reference in ArcGIS as: WGS_1984_UTM_ZONE_44N Then, I took the Curvature tool and with a Z-factor of 1 (i used value of 1 because i assumed units are in meters), I computed the profile,plan and...

I cannot find a way to show in the Legend the Bus icon from Maki. What should I write in the custom HTML? http://com.cartodb.users-assets.production.s3.amazonaws.com/maki-icons/bus-18.svg)"> Greyhound Station Appreciated any help. Thanks أكثر...

I’m working on building a GIS based groundwater travel time distribution (TTD) model similar to the one developed by Schilling and Wolter (2007)http://lilt.ilstu.edu/ewpeter/GEO435/Readings/2012/Schilling_Kelly.pdf. The conceptual model of cell TTD is illustrated below (Schilling and Wolter...

I'm trying to save the raster layer in the stand-alone python GUI but I keep getting a syntax error. I'm using the code from Save To Layer File (Data Management). And the error that shows up is: the LA MESA part of below: in_features = "spain_1901_1.shp"out_layer0 = "spain_1901_1"where_clause...

This year at the user conference we had (once again) multiple user come by the island and ask if it’s possible to run a model or script on a regular basis, or at a prescribed time… the answer is yes. Click the link to the esri blog at Scheduling a Python script or model to run at a prescribed...

This question already has an answer here: Create DEM from stereo pairs using ArcGIS for Desktop or Open Source GIS? 3 answers I have a few pairs of stereo air photos and I want to extract a DEM from...

I have to manually edit a shapefile of a couple of hundred points. I would like a quick way to jump from one point to the next in both the attribute sense and the visual/spatial sense i.e I would like to while in edit mode jump from object ID 1 to Object ID 2 without having to open the...

Does ArcGIS Desktop or any of its native extensions allow me to create DEMs from stereo pairs (acquired by satellite, GeoEye 1)? If the answer is a clear no, brownie points will go to an answer that proposes a viable alternative using OpenSource. أكثر...

Is there any freely available pointcloud data? I'm especially interested in dense clouds of small areas(5m to 100m radius) but anything else would be fine too. Edit:I've found that these pages have very nice and easy to access point cloud data. Thanks for all the answers...

European population is not as mobile as American. While Americans are used to upping sticks and heading for new and greener pastures, in Europe lack of common language as well as cultural emotional attachment to home are significant factors stopping people from migration. But the situation has...