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

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Is it possible to set points without coordinates onto a map?

I have the following Situation: csv-file with 1000 lines of measurements. These measurements were done indoor in a building without GPS. The measurement-system allows to set "markers" at any time. ...
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0answers
60 views

Easy Custom Labelling Error Code

I'm getting the following error - only on one of the vectory layers in my project. Can anyone help? Have tried a restart and reloading the layer and neither worked! An error has occured while ...
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32 views

NetCDF Qgis problem

I have a problem with importing a NetCDF file in Qgis. I added the file as a raster layer and I can see the layer. Now I want to change the colours by using the classify function in the properties ...
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1answer
82 views

How to edit shapefile name written to attribute table in QGIS?

I have adapted some QGIS pythonscript code from a previous question to assign the filename of a shapefile to that shapefiles attribute table as a prelude to joining multiple shapefiles together (the ...
2
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2answers
130 views

Identifying number of overlapping polygons in QGIS?

i'm looking for a possibility in QGIS to identify the intersecting parts in one single polygon layer with ten features, where at least four polygons overlap.
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2answers
45 views

Building error on enum of the QgsMapToolIentfy Class

I am working on a project in c++/QT4.8.5 based on the api c++ 2.8.2 of QGis It is a stand alone application I had to get information of a layer by clicking on it in the canvas So I decide to use the ...
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1answer
77 views

PyQGIS filter using date column

In QGIS python console, I can run the following to extract the week number from date column. How can I use the same in qgsExpression as a where clause? Any other option is welcome as long as it uses ...
2
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0answers
173 views

QGIS-Python Need to check if layer is in current extent and make it active

I'm putting together a plugin for QGIS. The user inputs a county and a coordinate pair. The plugin then adds in the county data and zooms to the given coordinates. The problem is that there are ...
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2answers
73 views

Greek characters are not displayed correctly in qGIS on Windows8

I am working on a laptop with two operation systems. One Windows8 and one with Ubuntu 12.. In both systems I have installed qGIS and in Windows I also have the FME 2014. I am trying to load a shape ...
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0answers
43 views

How can I get OSM data in QGIS in a way that shows the nodes of roads intersecting as it would in JOSM?

By using OSM data in QGIS, how can I show the nodes that are at the intersection of two roads? This is useful, because how will I know by just looking at the downloaded data from OSM into QGIS that ...
6
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1answer
187 views

Clear “Recently used coordinate reference systems”

After using some non usual SRC for demonstration purpose, I wish to clear my "Recently used coordinate reference systems" list for the sake of praticity. Is it possible? QGIS 2.10.1
3
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2answers
895 views

OSM Place Search in QGIS not working anymore?

We've used OSM Place Search plugin daily with QGIS 2.2, 2.6 and 2.8 and it's been great. However, it stopped working last week for myself and several other inter-office users. We enter search text, ...
4
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1answer
92 views

Is there a way to locate plugins in the QGIS gui programatically from pyqgis?

I've let my love of shiny new QGIS plugins get the better of me, and I'm finding it difficult to remember which menu / submenu / panel that a given plugin is in. I'm using well over 100 now, and going ...
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0answers
18 views

How to fix Openlayers Plugin error with proxy.setPort()? [duplicate]

I'm looking for some assistance sorting out an OpenLayer Plugin error I've received since installing it. I immediately receive a Python error with the following text: An error has occured while ...
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0answers
25 views

Is there a lower bound on the std deviation for v.kernel in GRASS?

I'm using the v.kernel function in GRASS to create heat maps. I am able to generate an acceptable heat map using a std deviation of .2 and a several thousand rows and columns. After the map is ...
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1answer
69 views

QGIS - find sections of district boundaries that overlap with city/county boundaries from shapefiles

I am working on a project where I need to find, for each US congressional district, how much of the congressional district's perimeter overlaps with a city or county boundary. Since the boundaries are ...
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1answer
78 views

Export shapefile with “non standard” characters to csv and read in excel

Macbook air mid 2011 running OSX 10.10.5 QGIS 2.8.2 - Wien Excel 15.13.1 (O365) When I export a shapefile containing non-ascii characters to a csv file using QGIS (setting encoding to utf-8) and ...
2
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1answer
94 views

How to export a CSV with lat lon WKT from a layer which is not in WGS84?

I want to extract a csv with lat and lon coordinates so I select -- Geometry AS_WKT but when the csv is created I see this LINESTRING (277054.55782319931 198725.03588318737,277052.43701817648 198727....
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2answers
77 views

How to save a selection in QGIS and keep the alias of field names?

I am trying to save selected features into a new shape file using QGIS 10.2. The new file does not contain the aliases for the field names. Is there a way to maintain the aliases in new files?
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1answer
81 views

How to select a feature with the mouse click programmaticaly

I am working in c++/QT 4.8.5 and the api c++ qgis 2.8.2 In my application i had top select layer with the mouse click button to get attribute value and show them in a popup windows I see in the api ...
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0answers
53 views

Difference tool

I am new to QGIS, however yesterday I had the Difference tool working and today I cannot get it working! I have followed the same method but no result. Is this common? How can I go about making this ...
2
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2answers
125 views

Is there an easy way to read output from Open Data Kit in QGIS?

I use Open Data Kit (ODK) to do field collection of points of interest. ODK outputs each collected point as an XML-file with a structure like so: <?xml version='1.0' ?> <data id="...
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0answers
37 views

intersecting two lines

How can we make 2 lines that meet each other (sitting on top of another), intersect each other in QGIS? How can we make a point between them? The reason why I want to make an intersection is that I ...
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3answers
418 views

Error in merging 2 shape files of different geometry types

I am trying to merge two shape files ... Here are the links of two shape files Australian State & Territory State and Territory ASGC Ed 2011 Digital Boundaries in ESRI Shapefile Format (http://...
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1answer
87 views

Error using zonal statistic

I'm using 2.8.1 QGIS version (Wien) and I have a raster layer with FWI values and a vector with district polygons. What I wnat is to calculate the mean pixer FWI value per district. I know the Zonal ...
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1answer
210 views

QGIS Open Layers Plugin - Question about Google Maps/Earth Policy

I am operating on OS X version 10.9.5 using QGIS 2.6.1 - Brighton. I am using the Open Layers Plugin version 1.3.6 (Google maps) to create shapefiles and edit existing shapefiles over the Google map ...
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1answer
63 views

Zonal Statistics doesn't work after updating processing (2.10.2)

After updating the processing tool zonal statistics doesn't work. in method 'SpatialReference_ImportFromProj4', argument 2 of type 'char * Could someone else try if it's a bug or just an issue ...
2
votes
1answer
189 views

Merge 2 SpatiaLite layers into one

I pretty new to database, so the question could sound simple. I have a SpatiaLite database with some multipolygon layers loaded. What I would like to do is to merge (not dissolve) 2 layers into 1. ...
2
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2answers
38 views

Colouring three individual attributes in point layer using QGIS?

I am new to QGIS and am learning the expressions function. I would like to know how to independently colour three separate attributes on a point layer as below:
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1answer
86 views

How do I develop a QGIS Data Provider?

I want to develop a data provider for QGIS, but I cannot find any documentation on how to. I can see that Python plugins are popular, but from the repository it looks like data providers are written ...
3
votes
1answer
83 views

QGIS field calculator returning results in different units?

I am trying to use QGIS to get the perimeter, area, bounds width, and bounds height of US congressional districts, using the US Census TIGER shapefile. I loaded the shapefile into QGIS, set my CRS to ...
2
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1answer
206 views

How to get pixel values of indvidual pixels falling under a poygon to shapefile attribute table or CSV?

I want to be able to write pixel values of each pixel falling under a polygon onto a polygon attribute table or a CSV. I have about 1200 polygons and a georefernced GeoTiff file with NDVI values. ...
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2answers
141 views

Overlapping polygons and features and how to dissolve

I am new to GIS area and also new to any software that can modify the GIS. I am currently working with South Australia map I have download from Australian census site. I am using QGIS to load the ...
3
votes
1answer
133 views

QGIS: can't run processing.algrun() in external Python application

I am trying to create an external Python application. I want to run this as a stand alone program in command line. I am trying to not use the QGIS console. A first step is to clip a point shapefile ...
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0answers
61 views

In QGIS Python console how can I calculate given the distance, bearing and initial point, the final point

In QGIS Python console, how can I calculate the location of a final point, given a distance and bearing from an initial point? In PostGis I see that it is ST_Project, however I would like to do it ...
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0answers
43 views

QGIS group to KMZ

There is a lot of questions about exporting single files, Im trying to see if there is a way to export an entire group in QGIS to a .kmz or .kml file that can be opened in google earth.
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2answers
186 views

Can QGIS import Multipatch geometry type?

can QGIS import multipatch 3d geometry type? What is the data structure of multipatch how computer record and draws it ? Is it solid or not??
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0answers
36 views

Port QGIS window and developed features to external application

I have developed a series of features in QGIS that will represent data in near-realtime. These features will respond to changes made in a series of external CSVs, which take their data from hardware. ...
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0answers
63 views

Is it possible to lock the layers using Qgis API Python?

I would need to load and "lock" two layers on the map. Locked means that layers cannot be removed from the layer registry. When I say removed I mean removed by the user using the QGIS interface (the ...
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0answers
43 views

Put Labels with distances on lines

this my first question in this forum and I don't have much experience on QGIS I have a layer with lines representing streets in the city and I have to show the distances of intersection points of ...
2
votes
2answers
144 views

Load style from database in QGIS

Maybe it's a stupid question, but I don't know how to connect layer style with database in QGIS. When I save the style to postgres database in QGIS, it automatically saves the style in the table ...
1
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1answer
84 views

Creating Main and Secondary Map in QGIS? [duplicate]

In QGIS I need to generate two maps on one, I'm aiming to have a large map covering a large area in Europe and in the top right corner place another map zoomed in to a specific country. Does anyone ...
3
votes
3answers
193 views

Styling segmented cased lines in QGIS

My client wants a map of bus routes rendered as white lines with blue casing. I'm using QGIS 2.8.2 on Mac OSX 10.10.5. I found a .kml dataset here: http://developer.trimet.org/gis/data/tm_routes.kml....
2
votes
1answer
55 views

Moving circle using QGIS?

Using QGIS 2.2, I want to move a circle from one specific point to another specific point: How can i grab the exact center of the circle and move it to another location without creating points in the ...
0
votes
1answer
255 views

PyQGIS: how to transform single QgsGeometry object from one CRS to the other?

I have a polyline layer with roads in WGS84 that covers several UTM zones. For every road I need to place a set of points at different distances (in metres). To do so I want to reproject each road to ...
3
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0answers
225 views

DXF Export won't work

I'm new to using GIS data. Using QGIS I'm trying to export a DXF file from a .shp file from the NYC OpenData site. I can open the file, pan, zoom, select the area I want to export, etc, but when I ...
5
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1answer
389 views

Contour lines with imported shape file using Blender GIS - wrong Z values

I've been making experiments with Blender GIS and QGIS. I'm having problems when importing Shapefiles with contour lines, with a field for elevation (ELEVATION FROM FIELD selected when importing). I'...
2
votes
1answer
144 views

How can a get OSM data in QGIS in a way that shows the direction of a road as it would in JOSM?

I am trying to download OSM data into QGIS in a way that is as close as possible to what it looks like in JOSM. I am doing a visual comparison between OSM data and satellite images. One of the things ...
1
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1answer
62 views

One-to-many table join in QGIS [duplicate]

I have a spatial layer (shapefile) that has one row for each of one of the attributes in the table (representing management units). I also have a non-spatial CSV file that has wildlife inventory data ...
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0answers
43 views

Clip vector with grid using loop to do fragstats background

I would like to put background border - with negative values - in my squere landscape in order to use in fragstats. I'm trying to do it with pyqgis. Exemple what I would like to do (figure 3). So, I ...