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

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2
votes
1answer
93 views

How to add point features with coords taken from a .txt and show them on the map canvas?

Ok, so i am on Windows 7 and using QGIS 2.6 and i have a .txt file with some simple coords. I have extracted the coords to a list, no prob with that. But i looked at the PyQGIS cookbook on how to add ...
2
votes
2answers
264 views

How to automatically convert dots on paper maps to vector points?

I have several paper maps with dots that I need to convert to vector points. I was hoping to get some suggestions on how to accomplish this without recreating each and every point by hand. I know ...
0
votes
0answers
97 views

Splitting lines at a specified distance and add attribute

I have used QChainage to create points along a line every meter. What I am ultimately looking for, is to split the line layer along this point into segments with the chainage distance as an attribute. ...
1
vote
1answer
84 views

Attribute Table Missing Information

I'm taking a QGIS MOOC on Canvas, and in one of the labs we're to change layer style using an attribute table. However, the attribute table displays some very strange information on my system. ...
1
vote
0answers
174 views

SVG Symbols not showing up in QGIS

I have made sure the SVG path is set and that the path has SVG files: Settings->Options->System->SVG Path > "C:\OSGeo4W64\apps\qgis\svg" In Layer Properties > Style Manager > Marker ...
0
votes
1answer
88 views

What causes MetaSearch plugin Search error “Record serialization failed”?

I'm trying to use QGIS MetaSearch plugin to search data stored in our pyCSW catalog. Metasearch will get the correct service info and the GetCapabilities response however, when I try to search the ...
1
vote
0answers
33 views

Is there an automatic way to reduce the legend according to layer content?

I have style-file with max. amount of types. Some shp-Files doesn't have alle these values. When I load the sld-File there always drawn the max. count of the values. Is there any automatically way to ...
1
vote
0answers
69 views

Trouble importing qgis.core python module

I am having issues loading the qgis Python modules in the osgeo4w shell. Ultimately I want to work with the modules in pyscripter. I tried the solution mentioned in Problem with import qgis.core when ...
3
votes
1answer
417 views

Intersecting lines get crossings

I have a set of lines representing bus lines. Some of the lines are overlapping and take the same roads. I am able to extract the nodes. However I am interested in extracting only crossings like ...
1
vote
0answers
327 views

QGIS Server - Internal Server Error at GetCapabilities reguest - no Apache error

Maybe the question is answered often before, but i can't find a solution which works on my system I try to install qgis server by the tutorials by using the following links ...
2
votes
0answers
91 views

QGIS 2.8 Raster Layers Moved [duplicate]

I recently downloaded QGIS 2.8 and opened an existing project in it to check how it handled it and make any changes required. This project includes several raster heatmap layers. My problem is that ...
4
votes
3answers
3k views

Importing SVG symbols into QGIS

I've downloaded the SVG icon pack here: https://www.mapbox.com/maki/ How do I import these symbols into QGIS? As far as I can tell I need an .XML defining each symbol. Also using the Import from ...
0
votes
2answers
603 views

Create DEM with 1 foot contours from lidar data with 1.4 meter resolution

I have Lidar data which contains multiple .las files for an entire quad. I have figured out which .las is the area I am looking for. I was told the data is in 1.4 meter resolution and would work to ...
1
vote
1answer
155 views

Georeferencing an old map in QGIS using Thin Plate Spline

![old map georeferenced badly][1] [1]: I georeferenced this old map using Thin Plate Spline, and Cubic Spline as transformation settings. However, the result was quite bad. Do I have to add points ...
1
vote
0answers
92 views

Dissolving polygons with common attribute within certain proximity to each other using QGIS?

I have a land parcel with a lot of polygons with the same attribute (owners). I would like to dissolve all the polygons with the same owners but only if the polygons are within 100m of each other. How ...
1
vote
1answer
58 views

QGIS Categorized Symbology based on joined table

I am trying to create categorized symbology for a data layer. The column that I would like to base the categories on is a result of a table join. For some reason it isn't working. All of my polygons ...
0
votes
0answers
94 views

CRS, pixels, and floor diagram

I am trying to create a building diagram for use in a DevExpress map control. My goal is to display a raster image background in the control with a vector overlay that defines features of interest. ...
1
vote
0answers
37 views

Displaying directional bandwidths in QGIS

I have a traffic model and want to display the results in QGIS. I have a shapefile for the road network and can easily annotate the flows onto this. However, I want to display the information as ...
3
votes
2answers
140 views

How to access checked layers in PyQGIS?

qgis.utils.iface.activeLayer() accesses the current active layer, but I would like to get all checked layers in the QGIS ToC. How can I do it?
0
votes
0answers
95 views

How to set a print composer title from attribute table field in QGIS?

I have a point layer with several fields (pollutants values). I've created a point layer for the atlas composition (a mean coordinate point layer, 5 points, 1 for each areas). I've used a graduated ...
1
vote
0answers
221 views

How to install pygame or Tkinter for QGIS Python?

So i have downloaded pygame and installed it. Now i want to write scripts and run them through the QGIS console that implement methods of pygame but when the console reads "import pygame" i get a ...
5
votes
1answer
319 views

How do I save topology errors in QGIS?

I'm currently doing a project on finding blocked roads in a road network layer. I've figured that I can use the topology checker with the rule 'must not have dangles' and find them this way. But I ...
10
votes
2answers
2k views

Why are heatmaps on qgis 2.8.1 produced in the wrong CRS?

I noticed that the heatmap calculation on the new upgrade version of qgis is given the raster map without any coordinate system. Have you got the same problem?
4
votes
2answers
126 views

Is it possible to copy a graduated scale from a polygon to a point layer in QGIS?

I have a polygon layer (represented by cells) and a point layer. I've used the graduated symbology with the polygon layer. Now I'd like to export this graduated scale to the point layer. The field of ...
-2
votes
1answer
159 views

qgis web client only load background layers and shp file

the qgis web client only load the background layers in the helloworld map. In the natural earth i only get the shaded relief. I open the example project in QGIS Desktop and it works fine. Then i ...
3
votes
1answer
91 views

Memory issues with zonal statistics

I have got a memory issue due to the use of the zonal statistics command into a loop. It seems that after using the ZS command QGIS stores some information in the RAM (cache memory?). It is not ...
3
votes
2answers
370 views

How to digitize rectangles with snapping in QGIS?

Trying to digitize a floor plan for a building (just need polygons for each room) in QGIS (shapefile layer). I started just trying to draw the features, but want to align polygons so that there is no ...
1
vote
0answers
70 views

Labels not displaying when rendering to image with pyQGIS

I'm using the simple example in the pyQGIS cookbook http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/composer.html I'm able to manipulate the features in my layer using Python, but the ...
0
votes
0answers
54 views

What replaces SQLserver SqlGeometryBuilder, for Windows store apps?

Porting Visual Studio 2008 C# application to Visual Studio 2013, Windows 8.1 store\phone app (need to include DB with the application). What DB to use (coding in c#), to replace this code, not sure ...
0
votes
0answers
122 views

How do I join multiple features with a single geometry-less table entry? [duplicate]

I have three features with the same ID, let's say "5". I also have a corresponding text table containing IDs among other info (for example a "category" value). I want to join the table with the ...
0
votes
0answers
25 views

Saving and updating problems with PostGIS-Layer in QGIS

I have a OSM populated PostGIS DB (filled with osm2pgsql). All tables are working fine. But for my work, I need to combine some polygons with some points: create table attraction as select way as ...
0
votes
0answers
17 views

Installing QGIS 2.4 from tar gz file download from official QGIS website? [duplicate]

I downloaded the qgis2.4 tarball from the qgis webiste. But it doesnt follow the typical version of 3 steps to instal (1} ./configure 2} make 3} make install). So I am stuck and unable to move ...
0
votes
0answers
60 views

Parcels management and land ownership

Is it possible for me to split a feature by the column area i input?Like A feature has 3000 sqm and i have in attribute table column 1= 2000sqm and column 2= 1000 sqm and based on this 2 colums to ...
2
votes
0answers
219 views

ImportError: No module named gdal qgis2.8.1

i am using QGIS 2.8.1 (32 bit) in windows 7). I imported two DEMs and trying to merge (QGIS>Raster>Miscellaneous>Merge)them. Unfortunately it gives me import error as below. Traceback (most recent ...
0
votes
0answers
39 views

How to configure “-nlt MULTILINESTRING” for DXF export?

When I try and export a polygon shapefile to DXF, the resulting features in AutoCAD are hatch patterns, which is as expected if you read http://www.gdal.org/drv_dxf.html, "Polygon and MultiPolygon ...
1
vote
0answers
102 views

Interpolated raster not aligned with the vector data (QGIS)

I have loaded some tab delimited text data into QGis to interpolate the points. When I get to the interpolation (IDW) part everything breaks down. The output raster file does not align with the ...
0
votes
1answer
35 views

PostGIS problem finding FK to PK

I have 2 tables in a postgres db to which I need to establish a 1-m relationship between. One of the tables has geometry, the other table does not have geometry but contain fields that describe the ...
1
vote
0answers
40 views

QgsSpatialIndex crash my deploy C++ QGIS custom application on windows

When I use the QgsSpatialIndex class, after leaving the method, my application crash. Looks like the object QgsSpatialIndex class works, it brings QgsFeatureId list, but from what I noticed something ...
1
vote
0answers
90 views

Using the QGIS Graphical Modeller how can I choose specific fields to make a join based on?

I wish to join one field from a shapefile to another shapefile within the QGIS graphical modeler. I am aware that there is a 'Join attributes table' algorithm but this joins all of the fields from the ...
1
vote
2answers
390 views

How to programmatically close a QMessagebox without clicking ok or X? [closed]

So part of my script in PyQGIS is this: QMessageBox.warning(None,"Warning","bla bla bla") The box apperas just fine but i want it to close after a few seconds so i am looking for something like ...
1
vote
0answers
49 views

QGIS how to merge a linestring layer and a point layer into a multigeometry layer

I have two layers: Layer1 is point type. Layer2 is linestring type. I need to obtain one unique layer merging both layers. Of course, it will need to be multigeometry type.
3
votes
3answers
2k views

How to connect points by lines?

I have a .shp file, where I want to connect all points (approx. 100) by lines. I have a data field with the order (i.e. 1, 2, 3, ...). I have tried PointConnector and Points2One, maybe I am using ...
1
vote
1answer
88 views

How to copy a line from polygon to an other polygon QGIS 2.6.1

I have a polygon(state) now the state divide into two. I have a new polygon with two state. I want to copy only the new border(line) which divides the two state from new polygon to old. I am ...
1
vote
1answer
201 views

How to apply Zoom Extent from several QgsVector layers with Labels in PyQGIS?

I have the following case: Project constists of three layers: Open Layers plugin with Google streets QGSVector layer with Point features and Label enabled QGSVector layer with Polyline features and ...
1
vote
0answers
102 views

How to break a large map into smaller parts (tiles), for printing, in QGIS [closed]

We have a map a very wide area. We want to break it into, for example 8, mutually exclusive parts, so we can print each one separately and, if needed, put them all together and remake the whole map. ...
2
votes
1answer
429 views

How to visualize a point cloud in 3D with GRASS?

I'm new with qgis and grass so I'm sorry if there is a straightforward answer for this question but I can't seem to get it done. I've imported a pointcloud into qgis from a datafile. Now i'd like to ...
1
vote
2answers
1k views

QGIS Server 2.8 on Windows Server 2012

I'm attempting to install QGIS Server 2.8 on Windows Server 2012 R2. I've followed the instructions here and here. I've moved all the dlls from OSGeo4W to SysWOW64 for completeness' sake. I'm still ...
2
votes
1answer
47 views

Display the size of the dot based on the value [duplicate]

I import a CSV File and for each coordinate, I get a point in the map. Can I set a column for the value. Then the size should based on the value have a special size. Or based on all values, it should ...
0
votes
1answer
104 views

error in selecting data from attrribute table QGIS

First of all, im not sure why all the data points from my csv file does not show up on qgis. I enabled custom delimiters to commas and still have no clue. it worked for my other vector layers except ...
0
votes
0answers
70 views

How to reload a raster file from the python shell

I do this in the QGIS python shell: # get the raster file (and data) of the active layer canvas = qgis.utils.iface.mapCanvas() rLayer = canvas.currentLayer() rLayerPath = ...