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

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2
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1answer
389 views

Install QGIS on Ubuntu with GDAL built from source?

I am trying to install QGIS on Ubuntu 14.04. While I can easily install it via the package manager or apt-get, I find that QGIS, when installed, does not have Python support as expected. The symptoms ...
1
vote
3answers
111 views

Is there a way to snap 2 lines together from 2 shapefiles?

I am currently having 2 shapefiles of a roadnetwork. One of them has the best network (lines intersecting correctly etc.) and the other has some attribute info I want. I have no similar attributes to ...
1
vote
0answers
109 views

Importing csv file in QGIS including names and description [closed]

I'm just getting to learn QGIS. I want to make a map (Google maps) where I can map all our customers from our database. Including names and even better: description, address, telephone, etc. All this ...
3
votes
1answer
41 views

How to save shape file as type 1 point file in Qgis?

QGIS saves point shapefiles as type 8 - Multipoint as default. I need QGIS to save as type-1 Point file. How?
1
vote
1answer
68 views

How to delete pinned points?

I'm working with QGIS Brighton. My project was started with an older version of the software, but I don't think that makes a difference. I have six points that were generated by calculating the ...
0
votes
1answer
189 views

QGIS plugin select and edit feature attribute [closed]

I'm looking for a QGIS plugin that can change attributes (attribute table) of features on a vector layer by selecting them with the mouse. I found this plugin "SelectTools": ...
5
votes
1answer
1k views

clip geometries in postgis table if they are inside a polygon

I have polygons defined in KML files just like this one, which I can easily parse. Example: <Polygon><outerBoundaryIs><LinearRing><coordinates> -91.463940,40.372660,0 ...
2
votes
1answer
126 views

How to compute orthodromic distance in QGIS?

I have opened a geotiff file with QGIS. The CRS of this file is EPSG:3857 (web mercator). When I use the distance tool in the menu, the computed distance is towards web mercator coordinates and not ...
1
vote
1answer
144 views

How to create selective output from a QGIS layer, using QGIS2leaf?

I want to create a web map on which only a selection of data from a layer is displayed. To the best of my knowledge the tool seems to output the full layer. In Mapinfo I'd run a query to create a ...
1
vote
2answers
252 views

Free GIS software for mapping drain lines on a golf course

I work on a golf course that is built on old farm land. We have old clay drains from the turn of the 20th century and lots of additional drains that have been added in the meantime years. No maps ...
1
vote
0answers
25 views

When trying to save a vector in QGIS a blank dropdown window appears

I am learning and using QGIS Brighton and have hit a obstacle. Everything has been going fine until I started using the experimental generalizer to smooth the contours that I had extracted from some ...
4
votes
1answer
146 views

Finding location entering coordinates in QGIS?

I am new to QGIS. Can I find a location on the map I'm working with by entering its coordinates? If yes, where do I enter these coordinates?
5
votes
3answers
1k views

How do I rename Shapefiles in QGIS?

I have a huge list of layers in a project that are named in a foreign language. I want to translate and add the English title to the name. When I right click on a layer and choose Properties -> ...
3
votes
1answer
466 views

What causes OTB pansharpening ERROR Inputs do not occupy the same physical space?

When I try to use the OTB pansharpening tool an error comes up and I don not really know what the problem is. I have a RGB and a Band8 map (both from Landsat8) which I want to use for the tool. All ...
3
votes
0answers
208 views

Statistically comparing two sets of coordinates [closed]

I have been given a task to compare two sets of points, one set being a set of predetermined points, on the other being a set of actual points that were taken in the field. I have to compare these ...
4
votes
3answers
316 views

basic problem using division in field calculator

This is a very basic question, but I can't figure out what's going on. I've got election results I'd like to simply display as percentages rather than vote totals, which should be as simple as ...
2
votes
1answer
485 views

How to get the Parameters for a Lambert conformal conic projection CRS in QGIS 2.6

I am currently having some trouble adding the CRS to a vector file that I want to re project to WGS84/UTM. The shapefile is using Lambert Conformal Conic Projection; ITRF92 horizontal datum and GRS ...
1
vote
1answer
118 views

Adding geometry to QgsVectorLayer with lon/lat coordinates

I'm creating a custom Qt app that uses pyqgis for showing data on maps. I have successfully created a map canvas that shows a world map from a WMS server. Now I'd like to overlay data on this map. ...
2
votes
1answer
87 views

Qgis how to combine a geotif with a country border shape file?

I have 2 files. A geotif with different values and 1 shape file with country borders of this area. Can I generate with this 2 files an image with the country borders and the data from the geotif? ...
5
votes
1answer
411 views

Black edges on overlapped raster images in QGIS

I'm beginner with QGIS and I have task currently to make some GIS map/data. I downloaded 3 satellite images from Landsat by USGS (multispectral, georeferenced) and I did overlapping of images using ...
2
votes
0answers
141 views

how to extend polyline to the intersection point?

I have a polyline shape file, would like to extend the polyline to the intersection point of the nearby polyline and snap using python in Qgis. Thanks
1
vote
1answer
192 views

QGIS 2.4 print composer map extent does not sync with main window

I'm using QGIS 2.4 and got some issues with the print composer. First thing is that the "update preview" button reloads the map, but does not change the view when I move to another place in the main ...
2
votes
1answer
183 views

How to auto-generate multiple maps with different features in QGIS?

Anyone can explain me how can i auto-generate multiple maps with different variablies using Atlas tool in QGIS? So i have only 1 layer which consists of 10+ features, and i want select some of that ...
3
votes
2answers
901 views

”No module named ogr” when installing QGIS plugins

In QGIS 2.6.1, when I try to install the FlowMapper and QGIS Cloud plugins, I get an error - "The plugin is broken. Python said: no module named ogr" - giving me the only option of removing them. ...
3
votes
2answers
286 views

How to output coordinates from a shapefile to a GMT or CSV file in QGIS?

I want to get the coordinates for a line shapefile as csv or gmt files. I click create "new layer" - "new shapefile layer" - I check the "line" box and then "OK". Then I make my shapefile. When I ...
2
votes
0answers
34 views

How to select points as geomtry in QGIS when both multipolygons and points are stated within the wfs-server?

I'm trying to show data from the following server in QGIS: h ttp://geodata.nationaalgeoregister.nl/bag/wfs? I made a filter on the data I would like to appear in my map. This is how I stated the ...
2
votes
0answers
128 views

QGIS polygonize GDAL DLL load failed

I'm using QGIS 2.6.1 and i've been having problems using the polygonize function. I keep getting a "DLL load failed" import error. I've searched older threads which unfortunately weren't able to ...
3
votes
1answer
67 views

display only one point for each ID

I'm working with a point layer (many many features) that has some attributes, like the elevation of each point. I created a polygon grid (5 km x 5 km each cell) with an unique ID and I made an ...
3
votes
1answer
199 views

Getting random values from geometryType() in a standalone PyQGIS script

I am asking this question based on the result I received from this earlier post. The following script only works if I set geometryType() == 3 as that is what is being printed out in the Python console ...
1
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0answers
33 views

QGIS rasterize a styled layer

I disabled information from a vector layer with a styledefinition. Is it possible to rasterize only the styled information in QGIS?
1
vote
0answers
338 views

MMQGIS Plugin not working with QGIS 2.6.1? (Resolved) [closed]

QGIS 2.6.1 on Windows Have done a bit of research on this and I think it may be caused by the recent update in version to QGIS 2.6 (it worked in 2.4). I am trying to perform an attribute join from csv ...
4
votes
1answer
336 views

Has anyone used QGIS as an alternative to Terrasync or ArcGIS mobile?

We are planning to purchase a rugged field computer (Trimble, Juniper, Ashtec etc.) for accurately surveying habitats and work sites in remote locations. In the past we have found that the software ...
3
votes
3answers
2k views

Problem using LAStools in QGIS 2.6.1: “global name 'os' is not defined”

I have a problem with LAStools in QGIS 2.6.1. I have never used QGIS to process LiDAR data before. I downloaded LAStools yesterday from the rapidlasso GmbH website. I unzipped the “lastools.zip” ...
5
votes
2answers
604 views

How to split lines with PostGIS and view the result in QGIS?

I have two tables, one contains lines (test_line) and the other contains the points at the vertices of the lines (test_line_vertex). I want to split the line into individual segments based on the ...
0
votes
0answers
48 views

Upload SHP to PostgreSQL via QGIS

There was the error when I try to upload the SHP to the PostGRESQL. The feature is the line type. The error was: ERROR: Geometry type (LineString) does not match column type (MultiLineString) Do ...
2
votes
1answer
233 views

QGIS - Save not working after copy-paste between layers

I am trying to copy points from one layer to another in QGIS, both shapefiles, both with the same schema, both point files, both with the same Coordinate Reference System. The shapefile was originally ...
2
votes
1answer
94 views

QGIS Print Composer - Display Symbols for Empty Classes?

I am working on a map of mortality rates for several racial/ethnic groups and I have created custom classes to encompass the rates instead of the QGIS classes created through its various modes. This ...
4
votes
3answers
1k views

GeoTIFF world file ignored by QGIS?

I am having trouble getting geotiff rasters to get correctly placed even with a world file available. I have tracked down some discussion from 2010 that suggests that if the geotiff already has the ...
1
vote
2answers
57 views

Display only the features containing a name

I used QGis to open a shapefile with the rivers in my state (Rio Grande do Sul, Brazil). I would like to know "the name of every river", but when I click on the rivers, most of the small ones don't ...
3
votes
3answers
536 views

Update point shapefile attributes from polygon shapefile using QGIS

I have two shapefiles: one point and one polygon. The point shapefile have five attributes that describe the points. The polygon shapefile have one attribute: name of the polygon. I am a beginner to ...
0
votes
0answers
139 views

Cannot see line made with PostGIS ST_MakeLine() in QGIS

I am probably missing something obvious while trying to do this basic job. thetable contains gps track points. The following aims join the track points by a line: CREATE VIEW line01 AS ( SELECT ...
1
vote
1answer
74 views

Extracting point for polygons from shape file - not working

I am trying to extract the lat long points for the polygons from a shape file. I have followed the directions from the following links: Get list of coordinates for points in a layer? How to extract ...
2
votes
0answers
39 views

QGIS Python install question

Apologies for the 101 question; however, in trying to ramp up on python/QGIS I've seen mentioned that python.exe is the key executable in a python install. I have both Python 2.6 and 2.7 installed on ...
2
votes
0answers
112 views

Using pdb in QGIS console

I am unable to use pdb from qgis console. If I run a function that calls pdb.set_trace() I get the error Traceback (most recent call last): File "<input>", line 1, in <module> File ...
0
votes
0answers
94 views

Is it possible to “re-buffer” river polygon dataset? [duplicate]

I've river polygon data representing the water quality. This polygon data were derived from polyline dataset according to a buffer distance in the attribute table. Unfortunately I don't have this line ...
2
votes
0answers
126 views

QGIS Dimensioning during edit

Is there a plugin or tool providing following functionality: I select 2 points (or vertices) - it shows the length between this points When i edit the point (or move vertex) the length automatically ...
2
votes
1answer
733 views

Orfeo tool box (OTB) in Ubuntu 14.04 and SAGA incompatibility (gdal versions)

I need to test segmentation of a 12000 x 12000 pixels scene. I successfully compiled OTB in Ubuntu 14.04 and ran the process. But when I tried to start SAGA, I got a startup error. I found that gdal ...
0
votes
0answers
53 views

Is there a tool that is similar to the ArcGIS repair geometry tool in QGIS? [duplicate]

I need a tool in QGIS that has the same functionality as the repair geometry tool (native of ArcGIS).
2
votes
1answer
598 views

ImportError: No module named processing [duplicate]

this question may have been discussed before but i was not able to find any answer. I am developing a stand alone python script that will invoke methods from processing module. I am seeing error ...
2
votes
0answers
109 views

Cartographic-complete Maps in PDF On Request using Open Source?

Currently I have some data in PostGIS. I want to implement the following: users will make a request via web, with parameters like location, scale, layers to be displayed, etc. and I need to provide ...