QGIS is a user-friendly, cross-platform GIS application licensed under the GNU General Public License.

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9
votes
1answer
324 views

Is there a simple way to sort layers alphabetically in QGIS?

I am working on a big GIS project and not being able to sort the items in the Layers panel is giving me hard time. I can have up to 250 layers in the Layers panel. I have a special naming scheme for ...
2
votes
1answer
61 views

Identify geographic location to points

I am quite new in QGIS and I really need your help. I have a map of Kenya divided into 68 districts and I have coordinates of 30.000 schools. The points have one variable besides the latitude and ...
2
votes
0answers
53 views

Refreshing MSSQL Layer in QGIS

When working on a map in QGIS I will often set up a view in my SQL Server spatial database and create a MSSQL layer based on this. As part of my workflow I often make adjustments to the SQL view ...
2
votes
1answer
273 views

QGIS 2.2 rendering problems

i have a problem with some geometry. When i run the check geometry validity i get an error coming back that the rings are not closed, so recangular forms that i have surveyed are showing up as ...
2
votes
1answer
141 views

How to call a method by BOTH a button AND a key shortcut

I have been trying to call a method by BOTH a key shortcut (as described here http://www.qgis.org/en/docs/pyqgis_developer_cookbook/snippets.html) and a button I created on the toolbar. The button ...
1
vote
1answer
179 views

Line bearing for wind direction for plume of smoke QGIS

I'm trying to draw a line representing direction of a plume of smoke for an emergency planning scenario in QGIS. The line needs to be 5km in length and have a bearing of 85 degrees. The closest I have ...
0
votes
1answer
103 views

Count points within a given distance of a border

I have a vector layer of counties in Florida and a layer of points. I want to count the number of points that lie within 10km of the boundary for each county pair. This is what this looks like in QGIS ...
1
vote
1answer
151 views

Is it possible to run qgis through python?

I need to build an app to analyze some raster layers in qgis. I thought it was possible to just write code in python (2.7.6) (IDLE) and let it automatically open QGIS, load some layers, do a distance ...
1
vote
1answer
211 views

How to handle QGIS 2.2 Data Defined Label Position on PostGIS Layer Null Defaulting to 0?

I just upgraded to qgis 2.2 from 2.0. In 2.2 there was a minor change to data defined label positioning at least when used with postgis layers. In Version 2.2 the labeling engine appears to be ...
0
votes
1answer
234 views

Error in QGIS 2.2 Raster Merge Tool in OS X

I'm having this strange error in QGIS 2.2 for OS X while trying to run the raster merge tool (in the Raster - Miscellaneous - Merge). This happens just by clicking on the "Select" button to choose the ...
0
votes
2answers
429 views

Best way to create/draw a map (especially indoor)

I'm currently developing an indoor map/room plan for an university project. I've already searched through stackexchange to figure it out but I couldn't find anything similar. So what I currently do ...
0
votes
1answer
2k views

Create a hyperlink to a pdf file in the attribute table [duplicate]

I want to add a hyperlink to a pdf file into the attribute table of a vector layer. I already read the documentation about evis and the answered questions about this here. It didn't seem difficult, ...
0
votes
1answer
197 views

How to create a slope map with different colors according to slope percentage or degrees

I have converted a dxf file with contour lines into a polyline shapefile, and I have used the Raster Analysis plugin to create a grayscale slope map from this shapefile. I would now like to have ...
0
votes
3answers
90 views

How create geographic column in postgis table?

I merged several point shape files in postgis, but when I load the new merged shape in QGIS it is not possible to see points in the main window. To create the merged table I used this piece of code ...
0
votes
0answers
26 views

I want the coordinates of my polygon grid to change when I zoom

I want the coordinates of my polygon grid to change when I zoom into my map and produce different data outputs in my attribute table so that my lable can show accurate values of the points within that ...
0
votes
1answer
115 views

Python Built-in Map and Zip function in QGIS 2.0 Processing Script--syntax error

I am attempting to run my Python script using the Processing Toolbox in QGIS 2.0. I've used the built-in Python function map() and zip() several times and am now receiving a syntax error even though ...
0
votes
1answer
126 views

Programmatically modify attributes for vector layer in QGIS

I am trying to programmatically modify attributes for a vector layer, using calculated values currently stocked in a dictionary. Any pointers on where i'm going wrong? my dictionary has the feature ...
2
votes
1answer
104 views

how to use custom fonts in QGIS mapserver on Debian Linux

I've got a QGIS setup running, except for the custom fonts. They work just fine on my desktop machine (OS X), but they don't work on the server (Debian Linux). I've got the .ttf files installed in ...
5
votes
1answer
184 views

How to change OpenStreetMap Layer Properties in QGIS 2.0

I have loaded the OpenStreetMap layer in QGIS 2.0, but would like to edit the properties in order to better complement the map I'm producing. I can't seem to find the OSM toolbar or OSM Feature widget ...
3
votes
0answers
752 views

QGIS cannot open output layers

I have problem with QGIS 2.0.1. Everytime I run tool from SAGA or GRASS, I get exactly the same error, for example: Oooops! The following output layers could not be open Channel Network: ...
0
votes
1answer
62 views

Change Case in .dbf file QGIS

Asked another question below and this will develop on from this. The Bedrock 625K BGS mapping is all in UPPERCASE. It looks clumsey and wrong in the legend. I wish to change it to Sentence Case. I ...
1
vote
0answers
15 views

Legend only to display what is shown in Print Composer QGIS 1.8.4 [duplicate]

I am using the 625k bedrock data from BGS. I have a range of site across scotland. I have then clipped the file down to within a 70Km radius of each site, a lot of over lapping areas with ...
3
votes
1answer
191 views

How to access M-values in QGIS?

I am working with Linear Reference Systems and I know is very easy to get M coordinate (M-value) from a shapefile in ArcGIS. But, how to get the M-value in QGis? If you have doubts about my issue, ...
3
votes
1answer
146 views

How to set up a QGIS project with SQL Server which can be opened on another computer?

I am using QGIS with SQL server 2008. I need to save project on one computer and then copy project to another 20 clients! After I save project and try to open it on another computer I am getting ...
4
votes
1answer
410 views

Snap points to line and calculate chainage using Open source GIS

I have a line layer (representing a pipeline) and a points layer (representing valves) and I would like to calculate the chainage of the valves along the pipeline. I assume that I would first need ...
0
votes
1answer
393 views

Where can I find GIS data about NYC's combined sewers (CSO) that's free to use?

I've located two sites that display the data that I'm looking for, but both lack exporting functions. OASIS NYC and maps.nyc/gov Otherwise I can't locate this data anywhere in a format I can use in ...
1
vote
1answer
324 views

ArcMap reports that PostGIS polygon data is self-interescting

I have an ESRI File Geodatabase of data that I upload to PostGIS using FME. Seeing as I have to have the data in PostGIS for other purposes, it would be great to view the data in ArcMap straight from ...
0
votes
1answer
204 views

Cut polylines at intersections in QGIS (or how many km road for each country)

I want to measure how many km a road stand on each country it intersect (i.e. how many km of the european road "E45" stand on Italy, Austria, Germany, and so on). I have a polyline-shapefile with the ...
1
vote
1answer
100 views

Gdalinfo and QuantumGIS does not recognize Spatial Reference even though Python does

I apply the following Spatial Reference to a file: spatialRef = osr.SpatialReference() spatialRef.ImportFromEPSG(3411) outraster.SetProjection(spatialRef.ExportToWkt() ) geotransform = ...
0
votes
1answer
106 views

Cannot display Oracle raster images using QGis

I am dealing with QGIS 2.2 and the plug-in Oracle spatial georaster. Apparently the connection to the database can be made, as the raster images are listed once you press 'Connect', but when try to ...
2
votes
1answer
223 views

QGIS 2.2 Raster Merge losing color data

I'm trying to merge a couple of GeoTiff maps using Raster > Miscellaneous > Merge but the merge is only coming out in grayscale. The geotifs are using palettes color. How do I get the merge to keep ...
1
vote
0answers
141 views

How can I edit spatial data automatically on postgis and check for topology errors on said data whitout using shapefiles?

So, I have spatial data stored in postgis (points, lines and polygons) and would like to edit and update those in an Open Source software (quantum GIS, grass, etc.) to check for topologic errors, ...
2
votes
2answers
2k views

Qgis - Couldn't load plugin 'processing' - name 'QsciLexerCustom' is not defined - Manjaro

UPDATED I receive the following error when I start Qgis: Couldn't load plugin 'processing' from ['/usr/share/qgis/python', '/home/v/.qgis2/python', '/home/v/.qgis2/python/plugins', ...
1
vote
1answer
186 views

Calculation amount or number of certain pixel-values in a raster

It seems pretty simple but until now I could not find a proper solution: In a given raster i want to know the number or ratio of e.g. red pixels. Edit: to be more precise: I have a number a arial ...
0
votes
0answers
54 views

how to mark certain distance alongside a coastline and saved as kml to import to google earth?

Hi all I would like to mark the region of 200 nautical miles away from the coastline, how can i do this? Thanks in advanced...i already try the buffering function on qgis but dont know how to create a ...
2
votes
2answers
1k views

How to download new version of QGIS 2.2?

Can anybody tell me how to Download Qgis 2.2 new release version? In QGIS website they mentioned in download window QGIS 2.0 . if u checked released data it was 24 feb 2014. So where i wll get QGIS ...
4
votes
1answer
763 views

Proportional Symbol Formatting

I need to create a proportional symbol map for a GIS class. I am wondering, how can I manually change the symbology to make the dots grow in size depending on their magnitude represented, and also how ...
5
votes
2answers
415 views

Creating contours for specific elevations

Input data: 1. an SRTM raster. 2. Point file of peaks. -Attributes contain ID, x, y, z and the elevation at which the peak is completely isolated from a neighboring peak. The output I want is a ...
2
votes
0answers
112 views

How to set posgis default sequential value in a QGIS “editable” view?

Introduction In a QGIS project I have a VIEW, that I want to became editable (I'm trying to replicate the versioning system used DB Manager with some tweeks). Therefore I created a few rules to ...
1
vote
2answers
135 views

QGIS and GDB issue with state published data

QGIS version 2.0.1-Dufour Good day.. I am new to this area and to QGIS, yet thus far I am enjoying the tool and its been very helpful to me. I'm working on a pet project and thus far I have been ...
2
votes
1answer
789 views

Showing unknown SRS (native SRS) when importing shapefile into GeoServer

I am facing a problem on an unknown SRS when I am importing a shapefile into GeoServer. I am trying to import a shapefile into GeoServer but when I am publishing the shapefile, it is giving the ...
0
votes
2answers
93 views

Print composer layout

I am new to QGIS and am using print composer. My questions are a) how to I change from vertical to horizontal orientation b) how do I zoom in on a map that I've added and 3) how do I stop a black box ...
0
votes
1answer
70 views

how to compile qgis-1.8.0 on ubuntu

i have downloaded qgis-1.8.0.tar.bz2 and I want to install it on my linux computer(12.04 LTS). How can I perform it please? I do it because I am desperate with Qgis 2.0.1 Dufour on ubuntu 12.04, ...
1
vote
2answers
139 views

Loading OSM data into QGIS

I have been trying to use OSM maps and my data is 60 GB around. I have imported it to QGIS as a vector layer but it seems the data is so big that the rendering is taking forever. My system has Intel ...
-3
votes
2answers
108 views

How can i create the spatial queries in QGIS? [closed]

please, Help me. i'll really appreciate your answers.
1
vote
2answers
498 views

QGIS: drawing order of lines and polygons (line between polygon)

I have 2 layers. One with forests and lakes (polygon) and one with rivers (line). Now I want the features to draw in that order: The river have to be UNDER the LAKES and the forest have to be UNDER ...
0
votes
1answer
152 views

QGIS QgsPluginLayer broken on 2.0.1?

Is there a generic issue with the QgsPluginLayer class in QGIS 2.0.1? When I take the basic Watermark sample from here: https://github.com/sourcepole/qgis-watermark-plugin and make a couple of mods ...
0
votes
2answers
129 views

Problem adding Delimited Text Layer in QGIS 2

I have a tab delimited text layer (text file created by excel for Mac) that I have used in QGIS 1.8 without problem. When I try to add the same layer, from the same text file, in QGIS 2.0 the Add ...
2
votes
1answer
196 views

Split and order lines by polygon intersection

I am using PostGIS and QGIS 2.2. I have a shapefile of rivers and a shapefile of state parks and other polygons. I would like to show the user a simplified version of a stream as a straight line, ...
0
votes
1answer
56 views

how to use two fields to control display format on map

I have a point shapefile with several numeric fields, among them FuelFlow and Slope. I have successfully applied colour to the various points according to the value of the FuelFlow field. Now I would ...