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

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0
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2answers
80 views

How to define the symbology used in QGIS print composer without using separate styles for screen and print

I use scale-dependent symbols for mapping (rendering Openstreetmap vectors as it happens). For instance paths show up when zoomed closer than 1:50000, but only roads show when zoomed out. The rules ...
1
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1answer
137 views

Adding tracks to gps with QGIS feature attributes as name

I am attempting to send a vector layer to a garmin gps in QGIS. I am using the GPS Tools extension and have created a new GPX layer. I can add waypoints without any issues, but when I copy features ...
0
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0answers
69 views

Sort polygons from north to south in QGIS using 'graphical modeler'?

I'm building a model in 'graphical modeler' in QGIS 2.2. I want my model to clip a polygon layer and give the polygons coordinates so that I could sort them geographically from north to south. After ...
1
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0answers
202 views

Creating custom CRS for India toposheets using QGIS?

Indian toposheets (pre-2000 series) of 1:50k scale are in Polyconic projection, with Everest 1956 spheroid and India-nepal datum. How do I create a custom CRS in QGIS to represent this, so that I can ...
0
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0answers
23 views

Calculating std dev for ruggedness using QGIS?

I have a DEM raster image and a vector layer with 200+ grids. Using QGIS, I got the terrain ruggedness index for the DEM layer. Now, I want the std dev (i.e. variation in ruggedness) for each of the ...
0
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0answers
95 views

Batch join non-spatial csv to shape files

I have 173 point shape files from soil testing and 173 non spatial csv files with lab ressults (one csv for each shape file) that need joining. The files are located in a library with folders named ...
1
vote
1answer
118 views

Is there any issue using R scripts with sextante processing framework?

I want to use R scripts from the module Sextante treatment QGIS , but I have many difficulties to configure the module in Sextante . Following the procedure described in the official documentation of ...
2
votes
1answer
479 views

How do I create a set of equally spaced points along a line using QChainage and export these as latitude and longitude coordinates in degrees?

In QGIS 2.2.0, how do I create a set of equally spaced points along a line using QChainage and export these as latitude and longitude coordinates in degrees? I am using the QChainage function in QGIS, ...
0
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2answers
37 views

How to set symbology based on an attribute of a 1-N table

Now, it is possible to edit geographic features and add elements in child tables using 1-N relationships. I want to construct a stacked - symbology which allows me to represent the multiple ...
8
votes
5answers
896 views

What cartographic line symbol could make a coastline represent water like this old map?

I live in a coastal area with lots of islands. Sometimes with a black and white map it's hard to distinguish land from sea. So I'm trying to replicate this old map's style. I'm trying to do this in ...
2
votes
1answer
839 views

Elevation color ramps for DEMs in QGIS

I need to color a DEM that I have loaded in QGIS 2.2. I'd like the DEM colors to represent different elevations, something like: https://dl.dropboxusercontent.com/u/26086662/color_ramp.jpg None ...
0
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1answer
44 views

How to determine aspect areas for different elevation bands in a basin in QGIS?

I am working in QGIS and have the dem rater, the vector basin boundary, the hypsometric curve and the aspect raster. I need to determine the north, south and east-west facing areas in each of the 15 ...
1
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0answers
39 views

Set Default Transparent Pixels in QGIS?

Is there a way to set QGIS to automatically load in images with no data values of (0,0,0) as transparent instead of black? I've looked through the forums, tried saving a .qml file out, looked through ...
1
vote
2answers
200 views

Georeferencing Vector Layer (shp) from Mollweide Projection to Custom CRS in QGis

the title might be a little complex. Its part of a massive project: I'm working on a fantasy world; a map, to be more specific. I basicly just started to paint a world map in Photoshop, but over time ...
1
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1answer
205 views

autocad-map of real estates with own coordinate system and information to be converted to use it in QGIS

I have a question regarding CAD and QGIS, but unfortunately I don't have a clue of CAD. Here it goes: Real estates data has been mapped. There are several reference points surrounding the area. So ...
0
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0answers
215 views

How do I use the new USGS topo WM(T)S in QGIS?

The WMS link for "Scanned Topo Maps from USA Topo" in http://viewer.nationalmap.gov/example/services/serviceList.html no longer works (HTTP 400). ...
2
votes
1answer
276 views

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border?

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border, including parts of the border that cross water? (I managed ...
0
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2answers
131 views

Output map of only 50m-100m contours [closed]

I´ve got the "OS Terrain 50" contours/spot-heights dataset. I would like to output a series of maps with everything above 0m, 50m, 100m etc. from a region. I know almost nothing about GIS, but have a ...
3
votes
1answer
192 views

How to creat multiple rings between two circular buffers?

I am working with mathematical-ecological modeling and I am also a new user of QGIS Software. First I am creating 3 circular buffers with same center (shape center) covering a region with roads (shape ...
4
votes
1answer
414 views

Converting models from QGIS to Python scripts?

I want to automate some tools for QGIS 2.0.2 using Python. Previously I have used ArcMap for automating tools and now i want to use QGIS. In ArcMap I used the ModelBuilder, and more specifically the ...
3
votes
2answers
607 views

TIF format to view a vegetation Map with QGIS

I'm a new user of QGIS and I'm trying to view a map present in an online GIS dataset. There are several formats for this dataset and one of them is a TIF folder with several files: .tif, .tif.aux, ...
3
votes
5answers
3k views

Unable to install ECW support on lubuntu 14.04

I try unsuccessfully to install the ECW support (mainly to use ECW file in QGIS 2.2). We attempt to follow and adapt the howto provided by makina-corpus. My first supprise was the repository ...
1
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0answers
54 views

PostGIS automatically creating geometries after importing using QGIS DB Manager

I have a shapefile consisting of linestrings, in which some of the features have null geometry. Yet, after importing it to PostGIS, using QGIS' DB Manager, a geometry is created for those features ...
0
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1answer
228 views

Add GPS tracks directly to a PostGIS table

Disclaimer: I am a total GIS newb and I have a use case I have not seen elsewhere. Background: I drive country roads looking for old building, cemeteries, school houses, etc and I record the ...
0
votes
1answer
85 views

Is it possible to change the style on a WMS layer using QGIS?

Apologies from a QGIS beginner but I have added a WMS layer of polygons to fill in the gaps of an existing data set I have. the problem is that I want all of this data to have the same style (colour ...
-1
votes
1answer
87 views

Applying styles to categorized layer using QGIS

Apologies if this is an easy question from a QGIS novice but I have categorised a layer so I can attach reference numbers and names to the various points but I would like all the points to have the ...
1
vote
1answer
372 views

Intersect between polygonal shapefiles error

I'm encountering a problem when I try to intersect two different shapefiles. They are all new shapefiles I created to descibe the land cover and the land use of a city. The problem occurs when I ...
0
votes
1answer
183 views

“ImportError: No module named fiona” (post-installation of package)

I'm in need of the Fiona and Shapely modules to develop a QGIS 2 plugin, and thus downloaded them from http://www.lfd.uci.edu/~gohlke/pythonlibs/#gdal and installed them. I have no trouble importing ...
1
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0answers
88 views

Graphical Modeler to rotate points based on line layer azimuth

I am trying to create a model using the QGIS 2.0 Processing Toolbox graphical model to replicate the process described in this thread: How to horizontally align irregularly shaped point symbol to ...
2
votes
1answer
1k views

How to merge hundreds of vector layers and sum attributes in QGIS?

I'm still at a fairly beginner level with QGIS and I've been banging my head against the wall trying to figure this out, so I would like to turn here for the internetz help. I am trying to construct ...
2
votes
1answer
80 views

Adding GPS tracking data from Excel into QGIS

Sorry if this is an easy question! I have added GPS points in QGIS however all of them are the same colour. I want the points to be coloured differently for each individual. How do I do this? Thank ...
3
votes
1answer
104 views

How to align an HDF layer

Forgive me, but I am completely new to GIS. I am using QGIS. I have a raster layer (HDF format) that does not align with other layers. All layers are projected WGS84 (EPSG:4326) and still the problem ...
1
vote
1answer
37 views

How to create a map from the highest and lowest average values [closed]

Anybody can help me, how to generate the map from assumption data. I have 100 points data (from GPS reading) showing the location of the bee nest. Unfortunately there is no record on how much volume ...
2
votes
1answer
65 views

unable to draw polygon without attribute window popping up?

I'm fairly new to QGIS and an trying to draw a polygon via "Adding Feature". When I make the first left click to start, the attribute window pops up instead of letting me continue on with additional ...
1
vote
2answers
3k views

Drawing tools to add circles, arrows, lines for QGIS?

I'm pretty new in QGIS and i'm searching a drawing tool like it is possible to find in microsoft word or excel. I search something very user friendly (for dummies!) to add circles, arrows, lines... ...
1
vote
1answer
283 views

Auto increment a new column using Model Builder Field Calculator in QGIS?

I am making a model which requires creating a grid and clipping various layers to it. Using the Create grid function does not provide an ID column, instead it creates 2 columns: "longitude" and ...
1
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0answers
216 views

qgis html annotation - scale dependent rendering?

In the QGIS 2.2 map composer, I have a large map at a certain scale (let's say 1:25000) and an inset map that is an enlargement of part of the main map (let's say 1:12500). When adding html ...
0
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3answers
374 views

Any updates on problems with loading ESRI FileGDBs in QGIS 2.2?

There are many posts in different forums about people having trouble reading File GDBs in QGIS 2.2, but no real solutions. Is there any word on a resolution to this problem? I am using QGIS 2.2 ...
1
vote
3answers
83 views

How can I apply multiple expressions to a field in QGIS?

I'm working expanding abbreviated names in a shapefile. I have written the following expansions, and would like to learn how to write a field expression that would do many expansions in one. replace( ...
2
votes
2answers
221 views

PyQGIS: How to send signal if layer is currently in edit mode

I'm looking for a way to send a signal if a layer is in editing mode. I tried editingStarted(), but it wasn't working. I'd like to do something along the lines of the what I have below, but can't find ...
1
vote
1answer
84 views

Auto generate map from natural earth data with QGIS or other utility

I'm looking at natural earth data to generate each country and save it as a png. What I'm using is: 10m_populated_places, 10m_admin_0_countries and 10m_land. The populates places is the first layer, ...
2
votes
1answer
78 views

Finding Code in QGIS Select Features Toolset

Can anyone tell me in what directory the pre-installed Python scripts for the QGIS selection tools (i.e., Select by Point, Select by Polygon) are found? I am using on a Windows 7 installation of QGIS ...
9
votes
3answers
4k views

QGIS, Postgis: Geometry type does not match column type

I'm trying to import some polygon shapefiles to Postgis in QGIS via SPIT. One of them can't be imported and returns this error: ERROR: Geometry type (Polygon) does not match column type ...
6
votes
1answer
287 views

Why will QGIS only import the first 20 lines of my delimited text file?

I have a file of bird species and counts with Lat Long that I want to put into QGIS (2.0). However, when I add the file it only shows the first 20 entries (excluding the field titles). This is the ...
1
vote
2answers
165 views

Open mail client when clicking feature in Attribute Table

One of the attributes/features of my layer contains an email address. I'd like to be able to open the default mail client by clicking on the mail address from the Attribute Table. After some initial ...
1
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0answers
347 views

Converting GRIB to Geotiff with gdal_translate in Python

I want to extract each band from a GRIB (gridded binary from http://data-portal.ecmwf.int/data/d/interim_daily/) in a single Geotiff image. I´m using Python with gdal_translate in a QGIS backround, ...
1
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2answers
412 views

How can I create a pdf map at a high resolution while still keeping the file size manageable?

I have numerous layers in shapefile format that contain a lot of data across a large area. I am trying to create a .pdf file that shows all of the area and I want it to be in good quality, so that ...
3
votes
1answer
164 views

How to implement 1:n joins with string attribute concatenation?

I have a question concerning pyQGIS. I'm a QGIS long-time (self-learned) user, but just a pyQGIS newbie. I want to implement 1:n spatial join with attribute concatenation in the table. I have a vector ...
1
vote
1answer
65 views

Problem with QGIS 2.2 joins between shp and csv

Didn't see question like this asked, so... I've joined csv to shp file and everythings seems ok. I've modified attribute form so that fields from joined csv appears in there. So far so good- it's ...
2
votes
1answer
332 views

How do I add a column in an attribute table using QGIS graphical modeler?

I have started to make a model in QGIS 2.2 graphical modeler. I have made a buffer around a polyline and used it to clip a polygon layer. So far i t works. But the next step is to add a new column ...