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

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3
votes
1answer
60 views

QGIS relations widget in custom form

I've just begun exploring QGIS relations option, now in version QGIS 2.2, details here: http://blog.vitu.ch/10112013-1201/qgis-relations This is a great implementation of something I've been ...
1
vote
1answer
73 views

Problem opening shape file in qgis

I am having a problem opening a shape file using QGIS using 'add vector later'. This is the error message i am getting: /Users/Conrad/AmerindianLands 2/Amerindian_Land_Karasabai.shp is not a valid or ...
2
votes
1answer
38 views

Adding graticules to the edge of the map only in QGIS

I would like to add graticules to a map, once it is in the 'print composer', on the border of the map, and not on the frame (my map insists on being smaller than the frame). I have managed to add a ...
0
votes
0answers
24 views

QGIS - Atlas. Outputs missing

This really teases me. Somehow the Atlas-function in Print Composer are missing some of my polygons from my layer, when doing a print. I´ve looked at them once again,- they are there, and the geometry ...
1
vote
1answer
52 views

Adding attribute list to combobox in a python plugin

I am developing a simple plugin at the moment which contains 3 combo boxes: comboBox_1 comboBox_2 comboBox_3 Combobox 1 & 2 lists the vector layers available, however I would like the 3rd ...
4
votes
3answers
97 views

How to shrink polygon on two sides?

I have a polygon which I know is a rectangle, although it may be at any orientation: I want to shrink this polygon by a third of the width from two sides, so that I just get the strip in the middle ...
0
votes
0answers
31 views

Raster format similar to ECW

I need an alternative to the ECW format that we currently have for a new series of Ordnance Survey maps. The ECW format looks clearer and less pixelated than the new maps in Tif format (in QGIS). ...
1
vote
1answer
40 views

Importing data into a project with a custom CRS incorrectly projected

I created a custom CRS for a project I am working on. I then started a new project, set to my custom CRS and turn on "on the fly" transformation. I import Rail data that I know is in my custom CRS, ...
0
votes
1answer
47 views

Georeferencing an aerial image based on satellite imagery

As part of a bigger project I need to georeference an aerial image based on a landsat image downloaded form usgs. I use qgis. can I somehow place the layers on top of each other and mark certain ...
1
vote
0answers
20 views

QGIS crash when selecting a Select Single Feature in attribute table

I'm loading several layers, styles and setting up some layer relations in a plugin that I execute. Once this is done I manually 'Select Singe Feature' on my map, switch to the "non-table view" in the ...
0
votes
1answer
66 views

Link Google Earth with QGis

I was wondering if it was possible to link Google Earth files (KML, KMZ) to a QGIS project. The main idea would be that if you'd add a point with coordinates in Google Earth, this point would be added ...
0
votes
0answers
7 views

GarminCustomMap: crash without error

My GarminCustomMap crashes without an error. Im using qgis 2.2 on Xubuntu Precise. I tryed with different settings but after 2 - 6 seconds QGIS crashes without any error. What could be the problem? ...
0
votes
1answer
55 views

What is the format expected by QGis for Latitude/Longitude in DMS?

I have been struggling with a csv file I need to import into QGis 2.2.0 (on Windows 7). The coordinates are in this format: LATITUDE LONGITUDE 424605 861204 395222 861206 303051 861219 ...
0
votes
1answer
26 views

Problems converting csv to shp in QGIS 2.01 on a Mac

When converting a csv to shp, I have been using the 'Add delimited text layer', and get one of two errors. With 'First record has field names' clicked, I am told that there is 'no data found in file'. ...
1
vote
0answers
25 views

Cannot Save Edits to File Geodatabase Replica in QGIS 2.2

When trying to edit a File Geodatabase Replica in QGIS 2.2, everything works as expected until the user saves their edits. When pressing save, all edits revert back to their original state with no ...
0
votes
0answers
27 views

How to add colour relief raster legend to QGIS print composer?

I created a colour relief GeoTif from a DEM with the Relief function of Raster Terrain Analysis in QGIS 2.2. Now I´m trying to creat a map of that in the print composer and of course I would like to ...
1
vote
2answers
60 views

How to select objects by N:M join?

I have a layer with some geometries and a data layer that defines an M:N relation. Is there any way I could select (on the map) objects that are in relation with specific id? Basically I would like to ...
1
vote
0answers
28 views

producing a bathymetric map in qgis with limited depths measurements

i am new to your community and hope you to find tips on how to work with the following project. i want to produce a bathemetric map (depths profile) of a water area. I do have aerial images and 3 ...
1
vote
1answer
40 views

Is it possible to link a QGis project with an excel file?

I have an Excel file with coordinates and I have used this file to plot the coordinates in QGis. I was wondering if it was possible to permanently link the excel file to the QGis project, so that when ...
1
vote
1answer
61 views

How to create polygons from a polyline graticule?

I'd like to make a polygon shapefile out of a polyline shapefile showing a graticule. However, using the "Line to Polygon" tool results in a peculiar...something: Other standard tools like ...
-2
votes
1answer
48 views

Interactive Gis application [closed]

I'm developping an interactive web(HTM5) gis application wich the user draw an element(circle for example)and extract data from base map(Open Street Map).The features would be: 1º Base Map like OSM. ...
2
votes
1answer
60 views

How to adjust QGIS attribute table view column width using Python?

I'm programmatically opening the Attribute table via Python through a plugin. All of the columns have a default width, but some of the data that I'm using do not fit. It's not enough to be able to ...
0
votes
0answers
31 views

Problem with QgsVectorFileWriter

I am trying to write a python script that when it is called it will take an .sqlite layer and save it as a GeoJSON layer. This will be used in a leaflet app but for now my problem is with this script. ...
2
votes
1answer
256 views

Wrong lon and lat

I am using QGIS 2.2.0! I have shape file with wrong coordinates, it's had replaced x coordinate with y coordinate. For example my point feature have coordinates: 4830698,7496859 and right coordinates ...
0
votes
0answers
28 views

PyQGIS loading layer style with PostGIS

I'm loading layer styles from .qml files in a Python plugin. I'm about to switch to loading them from a non-local postgreSQL db. I've been looking at the (from QgsVectorLayer (v2.2)) ...
0
votes
1answer
56 views

Is it possible to do a query to multiple tables?

I have a point a line and a polygon layer. They have the same attribute table. Can I do one query that refers to all the attribute tables? So I wouldn't have to do every query three times. Thanks. ...
1
vote
0answers
18 views

Calculating Percent Overlap Between Distribution Maps

Hello there, I am currently trying to calculate the percent overlap (basically the total amount of overlap where these two species come into contact) between Lithobates catesbeiana (first image) ...
0
votes
1answer
29 views

Displaying QGIS layer after loading with Python

I'm successfully loading several layers with Python, but can only get to see them in the map window if I manually zoom to extent afterwards. Once the last layer is loaded I call zoom to extent in the ...
1
vote
1answer
54 views

Python.dll could not be loaded with PyScripter

I'm trying to configure PyScripter with QGIS. I've installed it using OSGeo4W and I'm following instructions to setup a pyscripter.bat file by copying content of qgis.bat file. I have the following ...
1
vote
0answers
45 views

Ubuntu Touch and QGIS?

I'm planning buying a tablet for running Ubuntu. There are little info on experience with Ubuntu Touch and QGIS and does it work? What I want is to run it on the tablet, drawing polygons etc on ...
1
vote
0answers
33 views

QGIS Custom Form: “Other” category in combo box replaced by line edit

I am trying to create a custom form for QGIS with comboboxes containing an "other" category. I wonder how to provide a line edit to enter info replacing the "other" choice if chosen. Not sure if I can ...
2
votes
1answer
24 views

Upright/Horizontal lables when labeling polygons at perimeter?

I have several polygons (circles) I want to label with their ID number. The label should be outside the circles so I use the positioning options "Use perimeter" and the tickbox "Next to the line (or ...
3
votes
0answers
25 views

Why does the QgsVectorFileWriter have probelms creating vector files?

I am using QGis 2.0.1 and have tried to create a new GIS feature file (SQLite, Spatialite, and Shapefile) of a subset of the data. I am then saving a copy of the style of this layer and applying it to ...
1
vote
1answer
42 views

Why do the raster band values have different values than the raster statistics?

I am working on a raster file (1 Band). According to the raster metadata, my minimum value is 0 and maximum is 7458. This seems to be confirmed by the Style options that return some category values ...
1
vote
1answer
27 views

Overlay polygon on raster and save as new raster with same resolution

New to GIS and trying to learn. I'm trying to take a blue marble raster, overlay a countries .shp file, and save an image with the original blue marble image and the country outlines "burned into" the ...
2
votes
0answers
33 views

How to open QGIS attribute table in form view using Python?

I've got a plugin where I load some layers. On the last layer loaded I show the attribute table. I would like to select the view different from the table view (see image). How can I do this in Python? ...
1
vote
0answers
38 views

How to perform image classification with SemiAutomaticClassificationPlugin and BIP files?

I have multiband satellite images BIP format, Landsat TM/ETM containing 7/8 bands respectively along with a separate header file, some of them corrected by nearest neighbour classifier. I'm working ...
1
vote
0answers
18 views

How to disable log messages in QGIS

Is it possible to disable log messages in QGIS Dufour? When I work in QGIS 2.0, log messages increase to more than 2000 and it makes QGIS very slow. Then I save project and open it again, then QGIS ...
1
vote
1answer
22 views

Changing georef backgound colour

Working with a greycale scanned image: when I georef that image it rotates (expected) the blank corners are then filled with black. When the new image overlays I need to make those corners ...
0
votes
2answers
118 views

How to install PostGIS and OpenLayers plugins?

I am new to QGIS and have installed the QGIS v 2.2.0. For adding google map as a base layer I need to install OpenLayers plugin. I also need to add the PostGIS plugin for DB management purpose. Can ...
-1
votes
0answers
17 views

Couldn't load plugin processing due an error when calling its classFactory() method

When open the qgis desktop this error "Couldn't load plugin processing due an error when calling its classFactory() method" occurred why this error coming how to solve this.
0
votes
0answers
24 views

How to find qgis2 folder to delete in ubuntu

How can i find the qgis2 in qgis and where it is installed, i had one error on when qgis open this error will occurred "[ERROR] Can not make qgis.db private copy" some links told delete the folder ...
1
vote
1answer
29 views

How to create a TAB with custom CRS using QGIS?

I meet problem about reproject in Qgis. I created coordinate user defined. i used version Qgis 2.2. I defined coordinate: Name: VN 2000 / 107.75 3degees Parameters: +proj=tmerc +lat_0=0 ...
3
votes
0answers
20 views

Continuous color band for a raster legend in QGIS composer legend

I'm looking for a way to insert continuous colour legend for a raster layer. I managed to create discrete symbols with values along the bar, but I would like to have a continuous bar with some values ...
0
votes
0answers
28 views

Extract raster values under under each polygon buffer in qgis

In qGIS: I have raster file and >100 points. I constructed buffers polygons (vector-->geoprocessing-->buffer) around each of the points. Than I clipped (raster-->extraction-->clipper) the raster file ...
0
votes
1answer
29 views

Join text with layer

In Mapinfo it´s easy to link a text-layer with a geometric layer by attributes with outcome as a new layer. Where and how to do this in Q-GIS?
1
vote
1answer
22 views

Transect with square polygons

would like to create with QGis 2.2 (german version) several square polygons (1km ²) that seamlessly connect to each other, so that a strip ( transect ) of 9km times 1km length results . ( I once ...
1
vote
0answers
20 views

Move and zoom map-layer while editing

I want to create lines with the help of "CAD-like improved line capture", make a point, pretend an angle or distance want to put the second point. To this end, I have to zoom out on the map, select a ...
-1
votes
1answer
53 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
1answer
32 views

Retrieve path of running plugin in QGIS

In my plugin's directory I've got some XML settings files that I'd like to parse at a particular point during execution of the plugin. Is there a way to get the absolute path where the plugin's .pyc ...