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
577 views

What's the correct csv format for MMQGIS Join by attribute?

When trying to join attributes from CSV-file with MMQGIS, I currently get the error message: File inaccessible or in unrecognized CSV format /Netzplanung/Truck_park/trkbuspk15_2.csv Tried with ...
4
votes
1answer
2k views

Importing shapefile in grass

I have very simple shapefile, which consists of couple of polygons, and I wanted to snap boundaries automatically. Unfortunately qgis doesn't have such function, but grass has according this answer: ...
4
votes
1answer
544 views

Extracting donut holes as separate layer in QGIS

Does anyone know how I can extract the holes in a polygon layer as a separate layer in Quantum GIS? An example could be a country with a number of lakes cut out of the polygon - I need the lakes. I ...
0
votes
2answers
198 views

Can I incorporate an existing DBF file with coordinates for Tiff tiles into geodatabase like spatialite?

I have 285 Tiff files that make up the 1:10000 OS map of Norhtern Ireland. I am having problems running QGIS when I try to load all 285 tiff files in for base maps (I think the memory on computer is ...
2
votes
0answers
62 views

Strange line appearing

I have this line in my project's layer which i cant make disappear: I hope you can see it. In QGIS is much more visible. An it also appears on the print composer. Any suggestions would be very ...
3
votes
2answers
714 views

Why does On-the-fly reprojection not line up Google layers in UTM?

My UTM shapefile lines up with Google layers if the project CRS is set to WGS84 mercator projection (including default 3857 and Google). But if I set the project CRS to UTM Zone11, they are slightly ...
10
votes
2answers
800 views

How can I improve my Georeferencing results?

Background This is my second question related to georeferencing naked raster maps in order to re-visualize them on different coordinate systems and in conjunction with other data layers. The previous ...
3
votes
2answers
2k views

Why is my new Shapefile layer not showing up?

I am having trouble with a new shape layer not showing up on my map. The attribute table is showing up fine and all of the points are in there, however visually, there are no dots showing on the map. ...
9
votes
4answers
1k views

How to “clean” and vectorize a raster map?

I'd like to make use of a geological map as shown in the example below, which is only a pretty small and downsized part of the map, so editing/redrawing doesn't seem to make sense in the end. My idea ...
6
votes
2answers
379 views

How to generate discrete areas from multiple, overlapping features?

I have a point dataset that I want to append some information from a polygon to. My polygon shapefile contains over 500 features. Whilst each of these features represents individual areas they are ...
3
votes
2answers
582 views

Easy Search of Road or Address in QGIS

Is there an easy way to search for a road name in a polyline layer in QGIS? I'm looking for something like what ArcMap 10.1 has, just a basic search box where I can type in a name and have it give me ...
2
votes
0answers
44 views

Is it possible to permanently save the Edit Widget for a Postgis layer?

Is there a way of configure the editing type for a POSTGIS layer through Edit Plugin and do not lose the changes after remove the layer or exit the program?
2
votes
1answer
790 views

How to delete rings automatically using QGIS/Grass

I'm cleaning up a (very) messy shapefile in QGIS/Grass. I now have several large polygons with numerous (100s) of small rings. Is there a quick and easy way to remove/ fill all these small rings. ...
3
votes
0answers
203 views

Display a color ramp legend (of a vector layer) in the qgis map composer

I would like to have a color ramp instead of 10 categories of color when displaying my vector layer in the map composer of QGIS. Is it possible ? Thank you in advance
4
votes
1answer
634 views

How to select the nearest lines to a point layer?

I am a beginner with GIS software and I'm working on QGIS. I have a problem joining the spatial layers. I have a layer with objects in one city and another layer with the streets. I need to attach ...
2
votes
0answers
384 views

MSSQL spatial layer import error

I am currently working on a project in which spatial data are stored in a Microsoft SQL Server 2008 database. The tables which hold the spatial table contain 3 rows and are: RoomId - BIGINT, ...
2
votes
1answer
1k views

QGIS field-calculator replace function

I've got a Shapefile containing contourlines which I would like to style differently according to their value. For that reason I created a field named "100s" where I would like to give values from ...
4
votes
2answers
455 views

Data security for GIS Data (Esri shape files,Auto-cad files)

This is regarding security for GIS Data (in Esri & open source) (Esri shape files,Auto-cad files etc.) Does anyone know how to assign a password to or encrypt shapefiles OR CAD Data? I have ...
6
votes
2answers
632 views

Is there a quick way to invert a node selection in QGIS?

is there any way to invert a node selection in QGIS? For example, I want to extract a small section of a long line - if I select the nodes I want to keep, is there any way to invert that selection so ...
2
votes
0answers
74 views

Problem looking at tables within ESRI geodatbase

I installed the most recent OSGeo4W with QGIS 1.8.0 and GDAL 1.9.2 on my Windows 7 PC. I can load an ESRI geodatabase (.gdb file) and I can get the window "Select vector layers to add". When I click ...
3
votes
0answers
118 views

Why doesn't Polygonizer copy the line ids to my polygonized shapefile?

I am trying to convert a line shapefile into a polygon shapefile using Polygonizer plugin, and when my new polygons are created all the cells in my id field are "Null", although I have clicked "copy ...
2
votes
1answer
223 views

How to create/add features without geometry?

I have a simple SpatiaLite geodb loaded in QGIS with one table. There is a POINT geometry field and some alphanumeric fields. In some cases I can record data about a specific site, but the ...
4
votes
2answers
1k views

postgis error: when adding features geometry has z dimension but column does not

I have to define a geometry column in PostGIS for 2D points, but when I try to import points from DXF to postgres I get the following message: "postgis error: when adding features geometry has z ...
3
votes
1answer
962 views

QGIS Export Color mapped GeoTIFF to GeoTiFF

I've loaded a GeoTiff in QGIS (Single Band), and applied a Color Mapping. I can view it in the map canvas, but I would like to export the entire mapped GeoTiff as an appropriate 3 Band GeoTiff (i.e ...
1
vote
0answers
189 views

How can I merge postcode sector polygons into larger territories in QGIS?

I'm new to GIS so patience might be required :-) I'm building a basic web-based mapping tool for business use, to be used as a demo to show that we need one but managers don't know it yet! So far ...
1
vote
2answers
338 views

Display the outline of many polygons

I need help formatting an outline on a layer. The problem is that i have a layer with this attribute table: And the aspect of this layer is like that: What I need is to show an outline not around ...
1
vote
0answers
229 views

Raster satellite images for QGIS

When I try to apply a downloaded GIS satellite (t=rimage to Quantum, it doesn't seem to open properly. There must be a step-by step description on how this would be done effectively. Can anyone tell ...
6
votes
2answers
1k views

How to sum pixel values within a polygon zone in QGIS?

I have two layers: a raster layer and a vector layer (polygon). I can see the values of the raster pixels but I don't know how to combine them with information from the polygon layer. More ...
0
votes
0answers
17 views

How do I make lines look “continues” (images inside)? [duplicate]

Possible Duplicate: How can I merge segmented roads into one line? A TAB file in MapInfo looks like this : but when I import it to QGIS (and convert to shp) it looks like this : How ...
5
votes
2answers
406 views

How to identify polygons that have shared boundary?

I have hundreds of polygons that represent plants geographical ranges around the globe. For each species I have both a shapefile and collection of findings as points. I would like to analytically ...
2
votes
1answer
807 views

Reprojection from WGS to Slovenian Gauss Kruger in QGIS

I have gpx file (track) in WGS84 (EPSG: 4326) coordinate system from Garmin GPSMAP 62 which is right projected in BaseCamp and MapSource. When I save track as *.GPX and import it to QGIS and use ...
0
votes
1answer
163 views

FieldPyculator Plugin - How to concatenate fields?

How can i concatenate two fields using pyculator plugin? There is any document with all pyculator functions that i can use in "field expression"?
2
votes
1answer
161 views

Difference between NAD83 Indiana SPW in QGIS and ArcGIS for Desktop?

It seems ESRI and QGIS don't have the same definition for my most commonly used projection, NAD83 StatePlane Indiana West (US ft). When I create data in an ESRI product the projection shows up in ...
2
votes
1answer
407 views

Is there lat/lon grid option in QGIS?

For example, I have georeferenced layer loaded and I want lat/lot grid or at least some ruler in QGIS display canvas, to suite me as a helper. It looks like only reference is cursor tracking in status ...
4
votes
1answer
223 views

How to save space in the legend and write the layer name besides the symbol?

I'm starting using QGIS to make a project for university and I am with a problem on configuring legends on Print Composer. The thing is I want the text of my legend to appear after the ...
8
votes
4answers
2k views

How to use Z-Coordinate in QGIS?

I was mapping an area in Namibia and also tracked a lot of paths on my way with my Garmin device... so I thought it would be nice to see height differences in my area (esp. interesting in the ...
2
votes
2answers
533 views

UK Postcode District Aggregation

I've had a request recently to generate a map which includes UK Postcode districts, ie aggregations of postcodes based on the first section of the code (NW2, B1, E11 etc.). From what I've read, these ...
5
votes
3answers
724 views

Does QGIS have something like the MS Office macro recorder?

I would like to use python console in QGIS to automate tasks. Is there something like a macro recorder in MS Office to get the python commands?
2
votes
1answer
246 views

Having trouble linking VS 2008 C++ application

I am trying to resolve a few last exgternal link references in my program. Help in locating the correct libraries for Windows would be thanked. I may have incorrect versions of some of my current ...
4
votes
1answer
203 views

Which WMS is easiest to work with when using QGIS?

I'm using QGIS to style shp files. Currently I'm running GeoServer but not all the QGIS styles are imported to GeoServer (although its really easy to maintain it because of the layer preview and the ...
3
votes
1answer
880 views

How can I save the label style as SLD in QGIS?

In QGIS there are 2 options to style labels. Using the style properties. Using the label in the toolbox When I dbl click layer -> styles -> save as SLD , the style of the label isn't saved in ...
6
votes
2answers
185 views

How to sample a 3D raster along a 3D path (or 4D raster along 4D path)?

I have a 3d raster dataset of atmospheric variables (lat x lon x altitude). I would like to sample this raster dataset along a 3d path. Any idea how I can achieve this, preferable with qgis or ...
0
votes
0answers
90 views

QGIS MergeShapes Error

I am using the MergeShapes plugin with QGIS 1.8.0 on a Windows 7 computer. The issue I am having is when I perform a merge from a directory based on one geometry type, and then switch the geometry ...
1
vote
2answers
498 views

What is the default unit for QGIS scales and how do I set it to KM?

I want to render a specific layer only between 0-12km but have no idea how to set it in QGIS because the scales dimensions are high numbers. My project and layers CRS is EPSG:2039 Thank you .
3
votes
0answers
75 views

Detect connections along shapefile in QGIS?

I have a set of polylines and a set of points that lie along or very near to the polylines, and I need a way to measure which points are connected to each other along the polylines, and what the ...
5
votes
2answers
2k views

Exporting DEM-derived rasters to CSV from QGIS?

I have been able to import into QGIS a set of raster topographic maps and the associated DEM raster maps. It registered the two for me. From there I have calculated the associated slope raster map. ...
1
vote
1answer
73 views

Is it possible to get the style of a tab file I open in QGIS?

I'm trying to duplicate a map made in mapinfo pro with QGIS in order to create shp files for geoserver. When opening the tabs in QGIS they get some random style instead the one defined in mapinfo pro. ...
3
votes
1answer
183 views

How do I set labels to not be one over the other?

In certain zoom I see many city labels "written" on each other. I know there is a feature that set to auto hide labels that override each other ( and I'm not talking about rendering from specific ...
6
votes
3answers
3k views

How to make transparent the background of a topographic map in QGis 1.8.0?

I'm starting to use QGis 1.8.0. I have a raster topographic map, i.e. white background and black contour lines, houses, roads and so on. I want to make transparent the white background, so if I ...
1
vote
0answers
30 views

How do I set label to rotate with segment in QGIS? [duplicate]

Possible Duplicate: How to create curved labels in QGIS In MapInfo Pro I have an option to rotate a label with segment (this is nice for labeling roads for example). How do I do the same ...