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

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1
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2answers
126 views

Interpolation of xyz data

Data has been given to us in a HUGE .xyz file, which has been split into many component CSV files. When I upload the CSV file, then create the shape file by "save as", all is fine. When I go to ...
3
votes
2answers
30 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 ...
-4
votes
0answers
38 views

error while trying to build QGIS-2.6.1: qgis, qgis_app, qgis_gui fails for the reason qwt class couldn't found and QtUiTools.lib linking ignored [closed]

While trying to build qgis-2.6.1 from source on windows 7 32 bit with mvc++ 2008 I got the overall result ========== Rebuild All: 281 succeeded, 3 failed, 0 skipped ========== from this I am able to ...
0
votes
0answers
5 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
1answer
130 views

How to calculate the intersected area from a layer with overlapping buffers in qgis

I need to calculate the area of landusetypes in 50m around various dots (all in one shapfile). My problem is, the buffers around the dots are overlapping each over in some places. I tried to ...
0
votes
0answers
7 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
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0answers
6 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
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0answers
8 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
vote
2answers
530 views

installing older version of QGIS on Ubuntu

I recently installed the latest version of QGIS (2.0) on my UBUNTU 12.04. But am not very satisfied with it. I would like to uninstall it and reinstall QGIS 1.8 v on Ubuntu. Am unable to do so. It ...
-1
votes
0answers
16 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 ...
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
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
1answer
9 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
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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
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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 ...
3
votes
3answers
53 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 ...
0
votes
0answers
9 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
10 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 ...
2
votes
1answer
421 views

.dxf export in QGIS 2.0.1 gives hatches instead of polylines

This may see like a stupid question, but I'm new to QGIS, so please bear with me. I'm having a problem when saving as .dxf. I export a building layer (polygons) as a .dxf file However in AutoCAD it ...
4
votes
1answer
146 views

Is there an issue with Zonal Statistics calculating wrong mean values?

I tried to solve the following issue by myself but without success. On the one hand I have a raster file which is the result of the processing "shapes to grid" tool. On the other hand I have a ...
0
votes
0answers
11 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 ...
1
vote
4answers
2k views

Free Imagery WMS Feeds in QGIS

I was wondering if anyone knows of a free WMS of imagery that I could use within QGIS. The imagery does not have to be high resolution (Blue Marble even). I would like to have a base imagery feed ...
1
vote
1answer
304 views

Why doesn't the Kernel Density Estimate function appear in AniMove plugin?

can anyone tell me why the Kernel Density Estimate function does not appear under my AniMove plugin in QGIS? I can only perform the MCP. I run Windows OS.
5
votes
4answers
899 views

Split Lines at Intersection of Other Lines

I have two line layers (roads and contours in this example) and I would like to split the roads layer every time it crosses/intersects a feature on the contour layer. I can't seem to find a tool that ...
2
votes
1answer
25 views

Identify tool and highlighting behaviour in QGIS 2.6

I have a problem with the identify tool in QGIS 2.6. Somehow the object highlighting doesn't go off when i click on another object with the identify tool in QGIS. In earlier versions, when you ...
1
vote
3answers
2k views

Where is the QGIS Parallel Line Plugin?

Somehow I believe to recall there does exist some ind of "draw paralel line" plugin for QGIS. Could anyone please point me to - I cant find it :-/
-1
votes
0answers
22 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
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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
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 ...
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.
2
votes
2answers
234 views

Using Qt Designer to Create a Form in QGIS that can search for a specific point in a layer

I would like to ask if you can create a form in Qt Designer to create a form that can search for a point on the map using data that the user will provide such as the Name. I am currently creating a ...
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. ...
-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 ...
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?
0
votes
3answers
1k views

How to convert UTM coordinates into Decimal Degree coordinates?

I work on QGis 2.0.1 - Dufour on Macintosh OS X Mavericks. I have UTM coordinates (XXXX and YYYYY) in a table (with one column of X and an other one of Y). I need this coordinates in Decimal Degree. ...
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
1answer
35 views

QGIS change raster tiles properties at once

I have a set of several raster tiles and I need to change the properties of each one, by setting up a transparency for instance. I have found no other solution but changing properties of each one at a ...
3
votes
5answers
4k views

How to redefine the nodata value into zero in QGIS?

I have an image which i cliped with an AOI polygon. The contour area was set to pixel value = 0 and I have a nodata value of -32768. I want to redefine the nodata value into zero. I used to do this ...
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 ...
1
vote
1answer
39 views

How to create Spatial Reference System in QGIS?

I have some Attribute and the coordinate and the coordinate reference system. I want to create a DBmanagamet form my spatial data. To do that I want to create one table with name Spa_ref_sys, but I ...
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 ...
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 ...
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 ...
1
vote
1answer
30 views

Use raster memory layer from QGIS processing result

I want to apply subsequent QGIS raster processing algorithms in a python script. I want to use memory layers for intermediate calculation results since I am only interested in the end result. As ...
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 ...