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

learn more… | top users | synonyms (1)

0
votes
1answer
91 views

Census Shapefiles Fit to Land

I'm looking for an oceans or coastlines shapefile that's a more detailed than what Natural Earth has to offer (1:10m). I'm working with 2000 Census county shapefiles, but it doesn't cut out lakes or ...
3
votes
1answer
84 views

How can I label both coordinates in mmQGIS?

How can I label both coordinates in mmQGIS? Everything I try leads to only one of the 2 coordinates (lat or lon) to be labeled. I cannot get both labeled at the same time.
1
vote
0answers
155 views

Problem import shapefile in PostGIS database

I am having a Polygon shape-file. When I try to import this shape-file in PostGIS some of the attributes in Geom Field is found empty. But in attribute table when I select that polygon It is visible ...
3
votes
1answer
406 views

Can't seem to move labels manually in QGIS, 1.80 [closed]

Trying to move labels manually in QGIS. I am having the same problem when adding x,y to the attribute table. I picked (Type Decimal Number (real)), it's the only one out of the 3 choices that has ...
0
votes
1answer
112 views

Deleted layers still appear while loading project QGIS 1.8

I'm working on a project where I digitized a few maps (georeferenced) and I also added a couple of csv files. I deleted the raster and cvs layers after I included them into the project as shapefiles ...
0
votes
0answers
666 views

Add new rows to a shapefile

I'm using QGIS. When I enable editing of a shapefile's table attributes and select, 'open attribute table,' is it possible to add new rows to the shapefile's table attributes? The problem I'm trying ...
0
votes
2answers
677 views

Why is this SRTM TIFF not visible in GRASS GIS 6.4.3?

I want to use interpolated SRTM data for Germany to generate an STL terrain map for use in a CFD application. My SRTM data comes from the OpenDEM project. SRTM data normally has voids, but this data ...
1
vote
3answers
775 views

Why do area calculations return negative values?

I have created a shapefile with some polygons and am now trying to calculate the area of these polygons. The original CRS was WGS84, I have reprojected it to WGS 84 / World Mercator so unit is metres. ...
1
vote
1answer
943 views

Opening .shp file under Add Vector Layer

When I try to open streets.ship file from the exercise data file downloaded for working in the Quantum GIS Training Manual, I get an error message: Invalid Data Source C:/Users/new ...
2
votes
1answer
83 views

How to select all tenth in a field? [duplicate]

I want to select all tenth in a field! :( I know this way; "Km" = 10 or "Km" = 20 ... and so, but I am pretty sure theres other way. I am not SQL literate, but with your help in this forums I have ...
8
votes
2answers
564 views

Where did the polygons go after projecting a map in QGIS?

I'm fairly new at GIS know-how, but I've run into a problem with a projection of a world map. I have a shapefile of all countries I downloaded from Natural Earth. After projecting it into a ...
1
vote
1answer
110 views

In QGIS, has FGDB support improved this year, 2013?

I'm aware that there are users who successfully use Esri File Geodatabases with QGIS 1.8 Lisboa. FGDB support in QGIS requires the Esri API for FGDB, which is not open source (as I understand), and ...
1
vote
0answers
264 views

Qgis 1.8.0 throws error “Can not find the entry point sqlite3_rtree_geometry_callback”

Loading QGIS on Window 8 causes this problem: Can not find the entry point sqlite3_rtree_geometry_callback in the procedure of dynamic loading C:\....\Quantum GIS Lisboa \ bin \ spatialite.dll ...
3
votes
1answer
185 views

Get features in order they are selected using QGIS

Is there a way of establishing the order that a user selected features using QGIS and Python? By example: we have a network of line features representing a road network, and the user defines a route ...
5
votes
2answers
699 views

How can I define the layer CRS for a memory layer in pyqgis

how can I define the CRS for a memory layer from the qgis project settings vpoi = QgsVectorLayer("Point", "vectpoi", "memory") feature = QgsFeature() ...
2
votes
1answer
446 views

How do I project a Azimuthal Equidistant global map into a circle in QGIS?

I'm fairly new to QGIS/GIS stuff in general, so I apologize if this is too simple of a question, and I'm just bad at finding my answer. I have a shapefile of all the countries in the globe I ...
3
votes
1answer
234 views

Can QGIS open folder with “run feature action” tool?

Is possible to open folder with "run feature action" tool? I can open specific file like .dwg, but don`t know how open folder in specific location. This folder contain multiple .dwg files and when ...
0
votes
1answer
302 views

How to obtain rotation field name defined in the Labels “Data Defined” section in pyqgis?

I'm trying to find how to get with the QGIS Python API the layer field name that contain the rotation angle used by a layer to rotate its labels? I know that I can obtain the field name containing ...
2
votes
2answers
2k views

Problems with scale bar units in qgis composer

I apologize in advance for again bringing the topic up, I've searched for answers in other posts but couldn't find anything helpful. I fight a personal little war with the scale bar of the QGIS ...
1
vote
0answers
166 views

How to create a buffer around a point that takes terrain elevation in account?

In QGIS, I am creating a few different buffer around points to simulate walking distances. For example, 10 minutes walk about 800m at 5km/h. Using population density, I then clip a population layer ...
1
vote
0answers
35 views

QGIS : copy/paste with “Avoid Intersection” option

I need to copy and paste polygons from one layer to another but with adjustments in the pasted geometries: I need them to be cut in the same way they would have been cut by a single edit with the ...
1
vote
2answers
373 views

How to use centroid option in Field Calculator in QGis

I want to use Centroid option in field calculator in QGis .How to access it?
1
vote
1answer
146 views

Visualise data belonging to an area

I am looking for a way in QGIS (1.8.0) to visualise data, which is related to an area (polygon on a shape file). There are no x-y-coordinates with the data, just the info of the belonging area, means ...
1
vote
0answers
104 views

How to get National Geographic basemap in QGIS?

I'm proficient in ESRI's products and recently started using QGIS. I've used the national geographic world map (NatGeo_World_Map) in ArcMap, but am struggling to replicate this in QGIS. The map is ...
4
votes
2answers
852 views

How to change the color of a vector layer in pyQGIS?

Is it possible to change the color while adding a vector layer? I have a vecot layer with water areas and want to load it with a blue color. The layer is added with: ...
1
vote
1answer
162 views

Can QGIS Sextante or ArcGIS ModelBuilder batch extract vertices from KML polygons and calculate coordinates

I want to know how to extract the vertices of any KML polygon and also calculate the co-ordinates of such vertices in Degree Decimal format. I am looking at a batch process. Can we use the QGIS ...
3
votes
3answers
355 views

What DEMs does QGIS support? + DEM data sample

I am working on QGIS rasters. I want to know about DEM file formats supported by QGIS. I know that QGIS can read the GDAL supported formats. but what is GDAL supported format ? Does QGIS support the ...
0
votes
1answer
398 views

What does Error [sqlite3_rtree_geometry_callback is not found] mean in qgis 1.8 with windows 7 64 bit? [closed]

qgis1.8 does not open. I get a message that sqlite3_rtree_geometry_callback is not found
3
votes
2answers
101 views

How to map Traffic Count Points to Streets?

I've got point data representing traffic count locations and I am trying to figure out the best way to represent them on a map.I thought about kriging to provide a continuous surface but I don't think ...
0
votes
0answers
115 views

How to install Quantum GIS Lisboa and scipy

I'm trying to install some plugins of the QGIS but an error occurs. The program asks the scipy program. I installed Python, the Numpy and scipy. Also installed the program R. However, QGIS continues ...
1
vote
0answers
235 views

Georeference to UTM projection using openlayers plugin in QGIS

I have some aerial imagery that I need to georeference using QGIS into a UTM projection. In order to do this I need a basemap layer for the reference points. The openlayers plugin could work great ...
0
votes
1answer
99 views

How to standardise colour-value graduations across multiple maps

In QGIS I have a vector dataset (imported csv vector + csvt) spanning multiple years, and a shape file shape which is essentially a grid. By joining the csv file with the shape file I can apply a ...
0
votes
1answer
76 views

Sextante Plugin error in QGis

I am an user of QGis 1.9.0. When I go to Fetch plugin option Sextante plugin is broken seems what is the problem?Even I agin downloaded the plugin in Qgis official resportary but it displays me the ...
2
votes
3answers
1k views

Add points for every 100 m at polyline (QGIS/Mapinfo)

I have a polyline and want to set points for every 100 m. And if possible, with unique values for each point, 100, 200, 300 etc. Can it be done? The QGIS-plugin, Sextante algoritmes "v.to points" ...
1
vote
1answer
285 views

Is it possible to convert QGIS QLM to SLD (w/ New Symbology)?

I have a QGIS project where I have created some nice styles using New Symbology. I would like to convert this to either SLD for use in GeoServer or CartoCSS for use in TileMill. I have tried saving ...
2
votes
1answer
1k views

Convert 32 bit image to 8 bit image in QGIS

I want to convert my images from 32 bits to 8 bits. I'm using otb to calculate texture and the raster output is on 8 bits, I'm going to use this information as a layer stack for my multispectral image ...
0
votes
0answers
92 views

QGIS: MSSQL spatial layer bug with estimated metadata

It looks like there is a bug when connecting to MSSQL databases to add a spatial layer when using estimated table parameters. Connecting one time works fine and all the spatial enabled tables are ...
1
vote
0answers
191 views

Calculate Distance Matrix for ALL possible combinations in the dataset in QGIS

I have a Vector Layer that is created out of a MySQL database and has the relevant points stored in WGS84 format. The import works well, however, when I try to calculate a distance matrix between all ...
7
votes
2answers
821 views

Easiest way to create historical street maps using QGIS

I want to make some historical street maps using QGIS. I understand how to upload a historical OS map from DigiMaps to QGIS, but I want to actually 'draw' the streets myself in order to have some ...
5
votes
2answers
333 views

10 GB Raster Aerial Image in Quantum and POSTGIS

I have a problem... I have been successful in uploading the raster in postgis but when I access it through Qgis. it does not open even after several hours. I have 10GB aerial image raster and ...
0
votes
0answers
129 views

How to merge raster quadrangle tiles in qgis?

I've downloaded some dem tiles from here http://www.granit.unh.edu/data/search?dset=dem/dem174, which I'd like to merge into a single smooth digital elevation model usinq QGIS. So far I've tried ...
0
votes
1answer
215 views

Label polygons in MapInfo like QGIS?

I was wondering if there is a way to angle Polygon labels in MapInfo like it's done in QGIS (see image link below). Thanks, Alan
2
votes
2answers
667 views

Styling OS Vectormap Local in QGIS?

I am attempting to style Ordnance Survey Vectormap Local on QGIS 1.8.0 by using the styling sheets suplied by Ordnance Survey. The styling sheets are available from the OS website ...
1
vote
3answers
144 views

How to search for several different features in the attribute table?

I guess my problem is a quite simple one, but the query builder and I have our difficulties, so maybe someone can help me. I have a long attribute table in QGIS and am trying to extract about 200 ...
0
votes
1answer
125 views

Quantum GIS Installation Failure

I installed GSL 1.16 & GDAL 1.10, then I proceed to install QGIS 1.8.0 After running the .pkg(installer) I get the following message. Failure The GDAL 1.9 framework is required. Does this ...
1
vote
1answer
178 views

Making grid lines opaque so just lat/long coords on map border using QGISGDALPERF?

Can any one help me with adding graticules to my map? I have managed to add a lat/long grid over my map, however I want the grid lines to be opaque with just the lat/long coords on the map border - is ...
1
vote
1answer
658 views

How to create filled contour lines in QGIS?

How can I create contour lines that are filled with a graduated symbol usinq QGIS? In ArcGIS for Desktop I can do this. What about in QGIS?
0
votes
1answer
31 views

Can't get CRS transformations to work with scalie

No matter what I do I can,t seem to be able to transform several shape files (all vector) to a CRS that works. What is recommended for British Columbia for forestry purposes is NAD83 BC Albers. ...
1
vote
2answers
533 views

What is the equivalent of arcpy “Con” in QGIS and/or R raster-package?

I'm looking for an equivalent of the conditional expression "Con" from arcpy in an open source spatial analysis package. I'd prefer to use QGIS or R. To provide some additional detail, I need to ...
1
vote
1answer
137 views

How can I turn QGIS into a simple hiking planner?

I'd like to try and turn QGIS into a simple hiking planner. I have found and worked out how to import OS raster mapping at the correct scale and how to add freehand vector lines to the mapping, which ...