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

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2
votes
2answers
222 views

Is there any swamps/marshes symbol using Quantum GIS?

I am having hard time to find nature symbols for polygons. Any tips to find more symbol (any plugins?)
2
votes
1answer
218 views

how to extract overlap from non-dissolved buffer zones in qgis 1.7.4

I have a shapefile with the inventory of all limetree in a region. I made a buffer around each tree. So, the place where buffers overlap each other is the best place to put beehives. Is there a way ...
2
votes
1answer
514 views

Quantum GIS: Place all labels on a map non overlapped

As asked for ArcMAP by @dassouki, is there a way to place all labels on a map non overlapping using QGIS? Thanks in advance
2
votes
1answer
178 views

How to add FP_WGS_84_IBCAO_Polar_Stereographic projection to QGIS?

I have a GeoTiff image that is projected (see below) I would like to add this projection to the list of CRS in QGIS. Can someone help me do this? Thank you very much in advance!!! Francis ...
5
votes
1answer
2k views

How to do Kernel density analysis in QGIS 1.7?

Do someone have some suggestion? We would like to tray Kernel Density analysis as we did with ArcGis using QGIS?
6
votes
2answers
3k views

How to change DEM's gradient colour?

I'm a newbie about GIS. I'm from Italy and I've got a *.tif file of my region. I've loaded it has raster but I have a question: The dem has a gradient colour magenta. How change this colour to ...
1
vote
1answer
217 views

Exporting data from a WFS service to csv file using qgis

I have a service that contains a list of points with some meta data and I would like to export this to a csv file. I remember doing this some months ago and it worked well, but now I can't find the ...
1
vote
1answer
221 views

Digitize by User Input by Distance and Length in QGIS

I was wondering if anyone knows a way to digitize a line or polygon by user entered distance and length. This is an option in ArcMap, but I would like to be able to do this in QGIS. Thanks, Ryan
7
votes
1answer
1k views

One to Many Relationship in QGIS with PostGIS

Does anyone know of any tool that can do a One-to-Many relationship in QGIS. I have my data in a PostGIS database. I would like to be able to query spatial layers that are related to spatial or non ...
2
votes
0answers
112 views

OpenLayers Issue: plugin crash during opening [closed]

I've encountered problems while loading the OpenLayers plugin in Quantum GIS 1.7.4. My hardware: Windows 7 Home basic 64 Bits My Python crash window: Traceback (most recent call last): File ...
1
vote
2answers
387 views

FieldPyculator Plugin - How to Classify Fields?

Could someone tell me how to classify/populate fields with QGIS FieldPyculator Plugin? In the Attribute Table, I have a field named POPULACAO with population data: I want to apply a weight to ...
52
votes
3answers
28k views

File Geodatabase (*.gdb) support in QGIS?

Following questions: Open Source Tool capable of reading Esri File Geodatabase (.gdb)? How to access file geodatabase in Qgis? How to get FGDB support in GDAL 1.9 without compiling? I have spent ...
8
votes
2answers
385 views

Finding polygons without right angles

Now we are digitizing some buildings in specified area. The obligatory rule for this work - in most cases buildings should have right angles. We are using QGIS with CAD tools for this work. But ...
0
votes
3answers
664 views

How to run GDAL command in php page? [duplicate]

I want to develop a webportal that will show the QGIS generated images on dynamic website. For this reason I need to run gdal_translate command inside php page. but I don't know is it possible or not. ...
8
votes
2answers
3k views

How can I iterate over map layers in QGIS python

I'm having trouble figuring out how to iterate over map layers. I can access the currently highlighted layer in the table of contents via iface.activeLayer() but I want my code to operate on all ...
3
votes
2answers
2k views

how to convert qgis generated tiff images into jpg/jpeg using gdal command line utilities?

I want to develop a web portal that will show the images dynamically produced by qgis . but qgis provided tiff images are too big in size and it is not possible to show it on website using image ...
2
votes
2answers
249 views

Losing large portions of elevation contours from QGIS to PDF

Please forgive me as I'm new to GIS and all this might be a silly question, the wrong place for this question, or a hack way of going about what I'm getting at. So any suggestions on better practice ...
3
votes
1answer
164 views

Is it possible to mimic ArcPublisher with PDF or similar?

I want to provide mapping output in a format that mimics the delivery provided by ArcPublisher and wonder if anybody has any experience in this. For instance, the PDF format now supports layers ...
5
votes
3answers
5k views

How to create a new layer from a selection in QGIS?

I have been using ArcMap for the last three years. But I am now considering switching to Quantum-GIS. Is it possible to create layers from selection in QGIS? I am using QGIS 1.7.4-Wroclaw. UPDATE: ...
1
vote
1answer
484 views

How to create a worldfile by bounding box?

I need to create a worldfile from Bigmap Application. I've successfully to grab a pack of PNG tiles and the pearl app mosaicking all in one. The BigMap site shows the raster bounding box and util ...
1
vote
1answer
189 views

QGIS not reading colormap from hand-edited .qgs file

I have a set of rasters which store solar radiation incidence over the course of a year. In QGIS, I want to map the same extent, and with the same reference features, varying only the solar raster ...
1
vote
1answer
301 views

How to Make QGIS on Windows use Spatialite 3.0 instead of 2.4?

I spent all afternoon trying to figure out why my complex triggers are working fine in Spatialite-GUI but QGIS refuses to write to the layer. Finally remembered I ran into a similar issue a few ...
2
votes
1answer
446 views

How to transpose the lat/lon coordinates of a shapefile?

I need X to be Y and Y to be X (switching lat/long) within the polygon shapefile. If it were a point shapefile I know I could simply reverse the lat/long or x/y parameter and import from a table. I'm ...
1
vote
1answer
165 views

How to move the last vertex till the last angle is squared?

I have problem using Orthogonal Digitizing button from CAD Tools plugin menu. It moves the first point of the polygon by holding ctrl key pressed and pressing right mouse button till the last angle is ...
4
votes
3answers
1k views

How to read the GEOMETRY table inside a sqlite database

I'm working on an android app which should display some lineobjects stored in a sqlite database. This sqlite database is created through an export in QuantumGIS. My first question is it a real ...
1
vote
1answer
286 views

How can the scale be projected correctly in Quantum GIS when it is imported from google earth (KML) files?

While importing KML files from google Earth to Quantum GIS, the scale is not being projected properly and the area of a particular selected feature is not being calculated in the attribute table by ...
1
vote
2answers
175 views

Toggle editing option in plugins

I am working on python plugins for QGIS.I developed the plugins same as RT SQL LAYER plugins. When we draw the layers using query builder of "Add Postgis Layer" option,toggle editing option is ...
3
votes
2answers
369 views

Can Quantum GIS (QGIS) be used behind a paywall or barrier page?

The company I work for is a pay-for-subscription news website. Is it legal to use Quantum GIS (QGIS) to host maps that would be only available on our site to paying subscribers? I'm having trouble ...
5
votes
2answers
778 views

Garmin etrex 10 and QGIS

I want to know if anyone has been able to download data from a etrex 10/20/30 directly from Qgis. The usb protocol decsribe in a recent post does not do the trick. GpsBabel documentation states that ...
5
votes
1answer
879 views

fTools-Error: “…invalid geometry…”

I want to intersect contours with polygon like in the image below. But i got this error: Warnings: GEOS geoprocessing error: One or more input features have invalid geometry. Some output geometries ...
2
votes
1answer
432 views

How to create aux.xml file?

after starting to use MOBAC to create offline background maps I found the aux.xml files very useful as QGIS automatically sets the CRS so this would be very useful for my colleagues with smaller GIS ...
2
votes
3answers
844 views

Cut many lines with many polygons: Too much for my CPU/RAM?

I have a line-shp (80mb) and a polygon-shp (5mb) and want to intersect them. In result, the lines (contours) should be cut by the polygons. After using one of the tools "Vector -> Geoprocessing ...
9
votes
5answers
1k views

Multicriteria Analysis : how to?

I have to do a multi-criteria analysis to answer the question : "which is the best lot to develop". A few of the criterias are : distance of the nearest bus stop (point layer with bus stops) ...
3
votes
1answer
982 views

Is there a way to prevent labels from being on top of everything else?

I'm having a problem in QGIS 1.7.4. The labels I have produced for one layer are overlapping an entirely different layer that has a higher precedence. This should not happen. Am I doing something ...
3
votes
1answer
2k views

How to filter features in a layer?

I am trying to display certain features in a shapefile-based layer using QGIS. I have found the subset function in the properties panel, which does exactly what i want, but is too tedious given that I ...
2
votes
1answer
519 views

QGIS adding or removing values in the style tab (layer properties)

I'm new to QGIS and have recently been testing the software as my org plan to migrate from ArcGIS to QGIS in the near future. I often use the 'Add values', 'Remove values' and the group values ...
5
votes
1answer
4k views

How to smooth/generalize a polygon in qgis

Is it possible to smooth or generalize a polygon in qgis? Ìs there a plugin available like the generalizer-plugin for lines? I could convert my polygons to lines, smooth them and convert them back to ...
5
votes
1answer
636 views

Is it possible to setup fiddler to capture requests from QGIS

I want to know if it is possible setup fiddler to capture WMS/WFS requests from QGIS and how to do it. Fiddler is capturing the requests from MapInfo and I don't remember making any setup in fiddler ...
1
vote
2answers
455 views

How to combine “positive” with “negative” polygons

I have 2 polygone classes (1 and 2). Inside the polygons are holes (white). Now I want to combine them with the polygon in witch the holes are. Understand? Sorry for that bad english... The white ...
4
votes
5answers
782 views

Elevation correction ASTER GDEM2 (+10m)

My ASTER GDEM2 has a average elevation error of -10m for my area. (I testet it using 90 defferential GPS reference points and compared it with old Topo25, SRTM, and GoogleMaps). I would like to ...
1
vote
1answer
164 views

QGIS - WGS84 to BC Albers reprojection no curved lines, any idea why? How to snap a line to a point?

I am trying to learn a bit about QGIS. So I thought I would drop in some layers of my Province and then recreate some points representing the BC Albers Central Meridian, and the two standard ...
2
votes
1answer
788 views

Projection ETRS89 (Ellipsoid: GRS80) 6-Degree Zone 33 to UTM33N - WGS84

Hi I'm having trouble to reproject a shape file in Qgis. The projection is supposed to be "ETRS89 (Ellipsoid: GRS80) 6-Degree Zone 33" and I would like to project it to UTM33N - WGS84 (EPSG 32633). ...
0
votes
0answers
61 views

How to turn off Google map data copyrighted window in Google Street layer (Qgis - Openlayers Plugin)? [duplicate]

Possible Duplicate: How to close watermarks in openlayers plugin After a few weeks not using Qgis, this morning I opened it up, accepted a request to update Openlayers Plugin. Right now, I ...
0
votes
2answers
4k views

Why won't QGIS recognize my GPS?

Garmin BaseCamp recognizes and receives data from my GPSmap 60CSx, but QGIS GPS Tools plugin does not. Am I missing a step? I want to be able to transfer data both directions. MacOS 10.6.8 QGIS ...
2
votes
2answers
191 views

Switch classes on/off within shapefile in QGIS 1.8

Hei! I got shapefile with 1800 points. They are classified by attribute in 10 classes. How can I display only 1 or 2 classes (like - switch on/off layer)? It seems quite usual function, but I ...
2
votes
0answers
190 views

Problem with geotiff in qgis only in some PCs

Helllo I'm having some weird problem opening a 16bits geotiff with qgis. In my pc it opens and displays perfectly, but in another pc (with the same version of qgis) it displays all wrong the image ...
2
votes
1answer
320 views

Does anyone know how to get the QGIS Web Client measure tool to show units in feet and miles?

Does anyone know how to change the QGIS Web Client measure tool (distance and area) so that it shows feet or miles rather than meters?
4
votes
1answer
710 views

Why are GeoJSON coordinates different exported from QGIS vs. ogr2ogr?

I have a shapefile with a Google Mercator projection (900913) that I need converted to GeoJSON. I need to do this on a regular basis amongst other things so I wrote a shell script to do it using ...
0
votes
0answers
24 views

Running QGIS on PC using XT (Desk top) [duplicate]

Possible Duplicate: How to fix QGIS error “Entry Point could not be located”? The error shown below occurs each time I try to run QGIS: The procedure entry point gtCPLError ...
1
vote
1answer
129 views

Projection - once again

I have a shape file with nature preservation areas (Biosphärenreservate) in Germany. I think the projection must be something like gauss-krüger zone 4 Pulkovo or something like that. When I reproject ...