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Shadows provide three-dimensional perspective for astronauts looking down on mountains. أكثر...

I have a single polygon layer with over 200 buffers with a lot of overlapping areas. I want to use QGIS to create a new layer representing the overlap. I've seen several questions that are similar, but haven't been able to figure it out yet. I'm new to QGIS, so I may be overlooking a simple...

I'm trying to execute the following code on a windows 7 system: import qgis.core as qcqgis_path = "C:\Program Files\QGIS Lyon\apps\qgis"qc.QgsApplication.setPrefixPath(qgis_path, True)qc.QgsApplication.initQgis()print "Successfully Initialised"The qc.QgsApplication.initQgis() command causes...

I am attempting to extract and calculate the average height of buildings using LiDAR converted to raster elevation data. I've created a DSM to cover the entire area and am trying to extract just the buildings out, I need the average height based upon the DSM elevation pixels. How do I calculate...

A fast run through of the process of creating an old style map based on a simple vector layer, a texture and the built in styling of QGIS. أكثر...

This question already has an answer here: Getting Script Error has occurred in script on this page when running polygon to raster conversion? [on hold] 1 answer This problem keeps occuring...

I have a map with many points, these points map incidences of landmine accidents in Colombia. There are thousands of points and cover up parts of city and town names, in some cases the entire lables are covered. How can I get the city and town names to be on top of the data layer, i'd rather...

I am trying to get the z value from PointZ geometry from an ArcGIS map service, using the identify task. Setting returnGeometry=true only returns XY even though the Z value is there. I can see the z value when I query via the REST API, using the returnZ=true parameter, so I know the data is...

I am reading on StackExchange about creating buffers around points, lines, and polygons, using QGIS. Over and over, I read advice to convert data to a projection that uses meters (or feet, or whatever else the questioner is seeking to measure in). This leaves me still needing information...

Unless you are ones of those people who schedule eating-out days in advance, chances are that you decide to “try your luck” at the restaurant that you want to go and then decide that you need a plan B because that place is really crowded. If only there was an app for that! Immediate.ly, the...

EarthScope LiDAR point cloud data movie of the football stadium at the University of California, Berkeley. أكثر...

So I downloaded the Geoserver web archive and dropped it into webapps. After it appeared to have completed i went to http://hostname/geoserver and I am presented with a 404. Upon closer inspection I am getting this in the localhost log output. 06-Dec-2015 14:12:33.140 INFO...

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I am having a table of polygons with some 15 Mio. records. The polygons hold an attribute called "dn" with integer values between 0 and 6. My goal is to simplify that table so that polygons below a certain size get merged with neighboring ones. First step would be to merge dn=0 polygons of 100...

I am currently creating a system using OSM and I need to identify open areas in the map. I know there are existing open areas on OSM but is there a way to identify more open areas that are not pre-identified using OSM data? Or can I do this using a different approach? Thank you...

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When I attempt to “Export as PDF” a Print Composer image, it hangs up until I press cntrl/alt/del, whereupon I learn that QGIS is not responding and needs to be closed. I’ve tried this as jpg, jpeg, and tif. Don't know if this is related or a different issue--When I attempt to “Export as PDF”...

I am trying to use two different layers together to generate a layer of random points that represent sample sites. The two layers are:1. A grid layer of hexagon-shaped polygons created using the [Create Hexagon Tessellation][1] tool.2. A polygon layer with four categories of percent impervious...

The problem goes like this: I am trying to route osm data with the help of this tutorial (http://workshop.pgrouting.org) but in the step where I create the sql view and add the parameteres it fails to create the layer boundries. This is the error I get: java.lang.RuntimeException...

I have a ton of colors saved on the color palette and I was wondering how to transfer this color palette from a machine using QGIS 1.10 to a machine using QGIS 1.12. أكثر...