QGIS is a user-friendly, cross-platform GIS application licensed under the GNU General Public License.
2
votes
1answer
15 views
digitizing rectangles 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 ...
0
votes
0answers
4 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
6 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
5 views
QGIS - How do I join multiple features with a single geometry-less table entry?
I have three features with the same ID, let's say "1". I also have a corresponding table containing IDs among other info (for example a "category" value). I want to join the table with the features ...
0
votes
0answers
7 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 ...
-1
votes
0answers
11 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 ...
-1
votes
0answers
15 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 ...
1
vote
0answers
9 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
8 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 ...
0
votes
0answers
10 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
7 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
votes
0answers
21 views
image popups in QGIS
after choosing a file name am supposed to use an identify tool to click on a feature and give it a name..but in my case in my school property layer there is no identify too. in this case i don not ...
0
votes
0answers
6 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 ...
0
votes
0answers
9 views
How to specify which fields to join to another feature in the QGIS Graphical Modeler
I wish to join one field from a shapefile to another shapefile within the 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
33 views
How to programmatically close a QMessagebox without clicking ok or X? [on hold]
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 ...
0
votes
0answers
14 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
52 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
31 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 ...
0
votes
0answers
26 views
How to break a large map into smaller parts (tiles), for printing, in QGIS
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.
...
0
votes
0answers
17 views
how to install and use lastools then create contour map with .lasd file
Firstly, consider me an amateur by every sense of the word. I have QGIS 2.4 Chugiak for windows. I have an .lasd file with quad data that I want to create contours with. I have tried following ...
1
vote
0answers
17 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 ...
0
votes
0answers
30 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 ...
0
votes
0answers
58 views
Business plan for GIS Company? [on hold]
I want to do a business plan for my GIS company. We are in the begining of our company and we want to do a business plan. I don't have any economic education. I have only education on Geo-Informatics. ...
2
votes
1answer
30 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
32 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
27 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 = ...
0
votes
0answers
23 views
Can I display customer addresses based on their address?
I have a CSV file with a lot of addresses of customers.
Can I import this and it display a point on the address and all other information from the CSV for this entry?
I want to display later in wich ...
1
vote
0answers
13 views
How to handle Molusce ValueError: shape mismatch: objects cannot be broadcast to a single shape?
I have a problem in QGIS Molusce plugin. I opened two raster files represeting LULC of 2 years, and roads as a spatial variable. The result of geometry check was positive. On Area changes tab clicking ...
1
vote
0answers
24 views
TIN Interpolation in QGIS creates weird lines?
I am using TIN Interpolation to interpolate point features based on their cost attribute (value is between 0 and 5000). Graduated symbology creates something like this:
However when I am using TIN ...
2
votes
1answer
43 views
How to change the edit widget for fields in a layer with PyQGIS?
Is possible change the edit widget with PyQGIS?
I have made an extension that loads a PostGIS layer and I want to edit the date fields with the date widget by default without any change in the ...
0
votes
1answer
19 views
GRASS 7.0.0beta3 / statistics change after TIF import?
I'm new to this forum, and pretty much a beginner with GRASS (7.0.0beta3 installed atm).
So my question is the following:
Statistics (mean, min, max) change quite a lot after importing a .TIF grid ...
-3
votes
0answers
13 views
pgrouting in qgis for finding path from source to target
I have installed QGIS and for my project i need to give the shortest path to user from source to destination and following this tutorial
http://workshop.pgrouting.org/chapters/shortest_path.html
In ...
-1
votes
0answers
27 views
QGIS, Android and bug on invalid qt version [on hold]
It´s already reported, (http://hub.qgis.org/issues/11711) but there seems to be an on-going proces on this issue. I really need QGIS running on my Android (Nexus 10) and so do other users. Can ...
1
vote
1answer
22 views
QGIS get the X and Y of a raster file by click
I have a raster file (Geotiff) and try to write a plugin that can change the value of one cell in a raster (== array cell).
I know how to get a QGIS point but how can I get the array index from on ...
1
vote
2answers
31 views
non alignment of base layer and other vector layers
i'm sure you've encountered this problem repeatedly. i've tried all different methods.
Enable on the fly crs transformation.
go to settings and options to use crs data.
go to properties and change ...
2
votes
1answer
70 views
Best practice for a group working on the same shapefile, with open source tools
We are a small (~5) group working on a single, shared shapefile. The current workflow is that each one of us does the editing on a designated attribute field, on his local copy, then exports the ...
0
votes
0answers
16 views
Older QGIS 2.4 version installation in Ubuntu 14.04 instead of QGIS 2.8 [duplicate]
Right now I am trying to run SWMM model on QGIS2.8. But the swim plugin is not compatible with 2.8 version of QGIS. Can anyone suggest me how to download and install qgis 2.4 on Ubuntu 14.04.
It ...
1
vote
0answers
13 views
Unable to obtain linear distance matrix
I am using QGIS 2.6 (Brighton) and when doing a distance matrix, the output csv file appears blank. Is it possible that somehow the shapefile I am using is corrupted?Has anyone please got any hints or ...
-2
votes
0answers
31 views
Installation procedure for older version of QGIS (2.4) on Ubuntu 14.04 [duplicate]
How do I install an older version of QGIS, specifically 2.4, on Ubuntu 14.04?
I am trying to run SWMM model on QGIS 2.8, but the SWMM plugin is not compatible with that version. Can anyone suggest to ...
1
vote
2answers
28 views
WMS not loading in QGIS 2.6.1 Brighton
I'm using QGIS 2.6.1 Brighton, trying to load the following WMS layer:
http://services.nconemap.com/arcgis/services/Imagery/Orthoimagery_Latest/ImageServer/WMSServer
I can successfully load the WMS ...
2
votes
0answers
21 views
Changing the background color of the Georeferencer in QGIS
Is there a way to change the background color of the Georeferencer in QGIS? What I mean is, can I somewhere change the color that does not belong to the image that is about to be georeferenced?
Let’s ...
0
votes
0answers
13 views
Multiple raster layers of same area need georef.
I have many raster layers that I need to georef to my existing vector layers. Some are 8 unsigned, 32 float and 64 float. Is there a way to georef all the layers at once so they all have the same ...
1
vote
1answer
15 views
Label moved with Move Label Tool disappear on QGIS v2.6.1
I have done a deep research on previous post about "move label tool", but I have not found the correct answer for my case.
I have the version 2.6.1 of QGIS.
When I select a particular point of my ...
0
votes
0answers
32 views
Projection transformation into WGS 84
How to perform transformation from EPSG 4012 to WGS 84 in QGIS?
I have tried to convert from EPSG 4012 (Unknown datum based upon the Clarke 1880 (RGS) ellipsoid) into WGS 84 in QGIS with no ...
1
vote
2answers
30 views
Is there a “Identity (Analysis)” tool for QGIS?
In ArcGIS, there is a tool called "Identity." Say you have a bunch of points. Some points fall in polygons of interest, some don't. Each polygon has a unique ID. This tool will add a field to the ...
0
votes
1answer
23 views
Tools for building and exporting high resolution geotiff
I'm having some really nice raster maps in geotiff format. I would like to add some features to these maps as well as then exporting them as tiles for serving the map from a web server.
Preferably I ...
0
votes
0answers
9 views
QGIS Import WKB csv file
I have a csv with a unique field that are the coordinates of thousands of points but in WKB format. How can I import all the features into QGIS?
CSV file is like this:
...
3
votes
1answer
32 views
How to batch “Layer save as”-process in QGIS? [duplicate]
I want to save many (about 100) QGIS-layers at once. Is there an automatic way to batch the "save as"-process?
1
vote
1answer
21 views
'Add image' doesn't provide north arrow directory in QGIS Brighton
I'm still using QGIS Brighton to finish a map in Composer and would like to add a north arrow to it. In previous versions I added the arrow as an image, but when I click on 'add image' and click on ...
1
vote
0answers
12 views
QGIS Project: where to put CORE_Export definition in Visual studio 2010
I am trying to develop a QGIS application with the following setup:
OSGE4W qgis Libs
QT 4.8.5
Windows 7
Visual Studio 2010
I have all the references setup in VS, but am not sure where define the ...
