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

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1answer
844 views

Why does QGIS Profile from Line tool give me the same value for every point?

I'm trying to make an elevation profile with QGIS's Profile from Line plugin. But when I do, the resulting points all have the same value: -32,767. I'd like to know what I'm doing wrong. My elevation ...
1
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1answer
3k views

QGis 1.7.4 on Ubuntu 12.04

Will there be available stable version of Qgis 1.7.4 in Ubuntu 12.04? Version 1.9 is working fine at the moment, but as it is unstable yet, dont want to risk with my work. Thanks.
7
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1answer
9k views

Adding Layerfiles (.lyr) to QGIS?

At college we use ArcGIS Desktop 10, but that does not function on my Mac so I have QGIS there instead. I want to do my exercises with QGIS, but we use .lyr files with ArcGIS Desktop, and they are ...
9
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3answers
1k views

How to create a Hillshade model with multicolor “alà Imhof”?

I would like to make a Hillshade-Model with multicolor "alà Imhof". That means, I dont want a "usual" gray hillshade, I would like to use grey-blue and grey-violett from different sun directions. ...
3
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1answer
249 views

How to join interrupted river lines?

I have a vector map that I converted from a raster, representing the rivers in the map. However, because the colours in the map were very diffuse, the resulting vector map has many interrupted lines. ...
6
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3answers
2k views

How to create a user map from CSV?

I dont even know if QGIS is the right program for what I need.. What I need: I need a program with maps(Denmark to be specific), that I could feed with a database of users through a CSV file.. e.g. ...
9
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2answers
6k views

How to add Direction and Distance to attribute table?

anyone who can help. i just want to add direction (Bearing: i.e N 25 35 E) and Distance (Length: 125 meters) as my new field in polyline/line data. is there a plug-in to generate these fields? i tried ...
2
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1answer
2k views

How to delete a column of a shape file in QGIS? [duplicate]

Possible Duplicate: How to delete fields in QGIS? How to delete a column of a shape file in QGIS?The "Delete Column" tool is not highlighted even in editable mode.
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0answers
45 views

How to load GeoJSON files directly onto QGIS? [duplicate]

Possible Duplicate: Plugin or script to get QGIS to display geoJSON in a layer Is there a way to do this? Or is there a way i can put it onto PostGIS and then load it onto QGIS? I actually ...
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0answers
409 views

how to create shape file table from text file in QGis python

I have a text file with all field information how can create new polygon shape file table with the text file.. text file having following content.. NAME LAYER GM_TYPE KML_FOLDER ID PERIMETER ...
6
votes
3answers
611 views

Random value calculation in QGIS

Is there a way to do a random value calculation within a range in QGIS? I have been able to do this within ArcMap Field Calculator with the following code: Dim max, min max=20 min=5 ...
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0answers
81 views

Is there a plugin that collects and allows you to just “turn on” open layers?

I'm thinking on a similar approach as gapminder.org, only that this plugin would contain GIS-data, not only statistics. I'm specifically interested in if there is a plugin like this for QGIS. If ...
2
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2answers
531 views

How do I create a negative to positive value raster with neutral 0?

I have a raster layer with a band with values from -137 to 9229. I want to create a color scheme showing how far from 0 the positive numbers are in one color, and how far from zero the negative ...
3
votes
2answers
275 views

How to visualize this country data in Qgis?

I have a csv table, with data in this format: "name","country". Country code is in the same format as the world map SHP file attribute table (both are in the ISO standard). I learned how to join the ...
3
votes
2answers
916 views

How can I reproduce Getis-Ord GI* hot-spot analysis tool in QGIS?

I'm trying to find a hot-spot analysis plug-in for QGIS that would perform similarly to the Getis-Ord (Gi*) hot-spot analysis tool used in Arc, but have not been successful. Does anyone have a ...
4
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1answer
976 views

In QGIS map composer, how do I get the Item Properties dialog back?

Yes, well if there is button there, one is bound to click it.... I closed both the Item Properties dialogs in Map Composer. And I can't get them to give me any joy no more... QGIS Trunk
2
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2answers
551 views

Configure QGIS to show only the toolbars wanted.

I friend of mine who are using QGIS in their organization for non GIS-experienced people asked me a question the other day that I didn't knew the answer to. He would like to configure QGIS to only ...
1
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1answer
317 views

How to handle geometry change in Vector Layer?

Hy, I'm building a plugin in python that manage some lists of wkt from different intern sources (web services, bd, etc..). I can display every source without any problem. For displaying them, I use ...
1
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2answers
129 views

How to display a single in a group of nodes with same attributes?

In QGIS, if I have some nodes with a name attribute is there a way to display only one node that would be in the middle of this group of nodes having the same name? For example, let's say i have 3 ...
3
votes
1answer
385 views

GPS problem in QGIS

I have a very strange problem that I cannot understand. I am trying to put together a demo-laptop with QGIS and gps. On other computers I have it working as expected, but on this particular box ...
2
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1answer
866 views

How to use SQLite db with QGIS plugin?

Hi I would like to use SQLite for storing some information in my plugin for QGIS. I have a problem: if I put the db let say test.db among the resources as file, after compilied the resorce.qrc file, ...
2
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1answer
759 views

How do I automatically fill a table column?

I would like to solve basic problem. I need to automatically fill the table. How is in Qgis possible to fill it like : if column SPECIES contain string DOG -> write to column CODE integer 1? Thanks ...
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1answer
483 views

ImportError: cannot import name QgsVectorFieldSymbolLayer

I am using QGIS 1.7.4., downloaded April 2012, but receive an import error loading the class QgsVectorFieldSymbolLayer. As i understand this class has been added in the Python bindings on 2011-11-15. ...
5
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2answers
1k views

How to generate reports from a Shapefile?

i hope i can describe my problem. I´m into planning a guidiance system for hiking. And like it is, there will be signs with poi and the distance etc. on it. I´m collecting the data in a shape with a ...
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1answer
241 views

Why are layers not lining up with others with the same CRS? [closed]

I am creating a project on the UK and have downloaded various shapefiles. When I add a vector layer they are coming up as if they are not lining up. Some layers are nicely on top of each other with ...
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0answers
152 views

Polygon symmetry detection

I was wondering if there was any way to create main axis (axis of symmetry) lines for polygons. I have polygons that represents buildings. I will want to find main axes (axis of symmetry) for those ...
5
votes
2answers
733 views

QGIS affine - form of equation

I am at the mercy of a govt authority who have provided utility information in a cad format with a 0,0 origin and a nonsense grid. About a dozen files, the grid and origin are entirely arbitrary. To ...
2
votes
1answer
112 views

Keeping a vector layer always on top

I want to know how to keep a layer always on top of other layers! After adding a vector layer ( QgisInterface->addVectorLayer ), I want that layer to always be displayed on top of layers added later. ...
4
votes
1answer
2k views

How to get point attribute from polygon layer?

I have two layer, one (A) has point features and the other (B) has polygons. I need to produce a new table with some (the ID) or all the fields from the A table and some (the area code) or all from ...
5
votes
2answers
526 views

Display of zoomable image thumbnails instead of symbols on maps

sincere congratulations on your ingenous QGIS and the many extremely useful extensions. In my research on African archaeology I work a lot with geotagged pictures (drawings; photos; plates etc.) which ...
3
votes
3answers
931 views

How to create svg line style in QGIS?

I need to draw an telephone or energy lines as is done on the polish-core map. Thelephone line was drown by the polyline. I tried the SVG symbols, when I have a lot of single-lines, for each I 'put' ...
3
votes
1answer
674 views

Hyperlinking in QGIS - Add Data to current window

I am looking to add to my current action in QGIS so that a hyperlinked file will open in the current QGIS window, rather than in a new window. Here is what my action looks like: "C:/Program Files ...
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0answers
98 views

How to maintain schema when copying feature from layer 1 to layer 2, where both layers have same schema?

If I load two unique layers, wherein each layer contains unique data, but both layers share the exact same schema, why is it when I copy a feature from layer 1, and paste it into layer 2, the ...
3
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2answers
525 views

Why does the attribute Table not maintain input data?

for a longer time I have a problem with the attribute table. I create the polygons on the map, I fill up the table with attributes. Then, if I click "save", all the data from the table are being ...
3
votes
4answers
2k views

How to ceate a point layer from a table in PostGIS?

I have a table in PostgreSQL(postgis). This table has latitude and longitude values in it. Now I want to plot these point in qgis. The only thing I could get done was connecting to the database from ...
2
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1answer
902 views

How to open existing sqlite DB in QspatiaLite plugin?

Using QspatiaLite plugin in QGIS I'm able to create a new database and work with it (load/edit/import/export data). But how can I add a connection to an existing database? How to add an existing ...
15
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1answer
1k views

How to load Ordnance Survey OpenSpace in QGIS?

The version of gvSIG that I have on my Android tablet will load OS OpenSpace layers and I wonder whether or not it would be possible for QGIS desktop to do the same? And if so, how? I have my own ...
8
votes
1answer
5k views

Understanding QGIS buffer tool units?

I have been trying to figure this out for a couple weeks now and have had no luck getting the buffer tool to accept anything but degrees as units of measure. I have found lots of stuff saying the ...
0
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0answers
32 views

Re: QGIS - Select Feature gives nonsensical results [duplicate]

Possible Duplicate: QGIS - Select Feature gives nonsensical results Thank you for your replies. To address some points raised, firstly in the attribute table I don’t see a ‘show selected ...
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vote
1answer
1k views

How does “Show only visible features” work in Map Composer?

If I tick show only visible, I get no features. I have created an attribute table in the Map Composer in QGIS trunk QGIS version 1.9.90-Alpha QGIS code revision 4d6cc6d I note recent feature update ...
1
vote
1answer
214 views

Python27 in Quantum GIS is missing SQL drivers in PyQT4

I am developing a QGIS plugin and need to create a table view in my GUI that I have been designing with QT Designer. I have PyQT4 installed but I have noticed that I have 2 Python directories. I have ...
1
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1answer
378 views

Why does Select Feature give nonsensical results?

I am a beginner with Quantum GIS and with no previous experience or expertise in Geography or GIS. I have an ESRI shapefile of New Zealand census area units (CAUs). My goal is to obtain distances ...
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0answers
150 views

qgis rgb raster layer: min/max-values definied by user not working?

I tried several times to define the min/max-values for the rgb-display under properties>style: Benutzer min/max-Werte (user min/max-values) but it is not working. By chance it worked once but now it ...
2
votes
1answer
4k views

How to add points to a point vector layer - QGIS

I have a point layer with multiple data points in QGIS, but I want to add some extra data points to it and adjust some info that we missed because the ground was wet and we needed to go around it. I ...
6
votes
2answers
4k views

How to move labels in QGIS?

I'm trying to manually move labels but having some trouble. I'm trying to move the labels while in edit mode. I've added fields for x coordinate (all null), y coordinate (all null), rotation (all =0), ...
21
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3answers
13k views

How to convert ArcGIS .mxd file to QGIS .qgs file?

I recently tried to use QGIS and I wondered if you can convert a draft ArcGIS map (*.mxd file) into a QGIS project (*.qgs file). This would avoid thematize the entire project.
6
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1answer
1k views

What sampling tools are available in QGIS?

I'm looking for a tool to generate a stratified random set of points within the boundaries of a polygon layer. In ftools 0.6.1 there is a tool which almost does what I need, but misses the stratified ...
2
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0answers
524 views

No file is created when I choose 'Save style …' in layer properties

First of all, I create a layer using the Add Delimited Text Layer plugin. The layer contains longitudinal and latitudinal data and a number that is assigned to each data point. When using a graduated ...
3
votes
4answers
7k views

How can I import georeferenced photos (jpg, kml, kmz) using QGIS or ArcGIS for Desktop?

I've got several georeferenced digital photos as jpg, kml, and kmz. How can I import them into my GIS projects (QGIS or ArcGIS for Desktop) so I can open them as a popup?
7
votes
4answers
4k views

How to split a vector in equal smaller parts in QGIS or similar?

i want to divide a shapefile with many tiles into a lot of smaller tiles. I am searching for a smart solution, because manual edits are out of questions Anyone can help or know a nice function?