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

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25 views

MSHP file from SAGA tough to delete

After running a SAGA line dissolve process in QGIS, an MSHP file is created (amongst other things). Fine by me, though I'm not sure what it's used for (metadata in XML format?). Problem is that it ...
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0answers
110 views

Is it possible to use .bundle and .bundlex files in QGIS?

I am working with a colleague that has given me UK OS data and Aerial image files to work with in .bundle and .bundlex form. This isn't a huge amount of data as we are primarily working to the ...
1
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0answers
48 views

Where is the network message log tab in QGIS on Windows7?

I want to find out what web requests is QGIS exactly sending to my web server when it connects to a WMS and WFS layer. In my Linux installation of QGIS 2.0 I can see three tabs in the Log Messages ...
3
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3answers
197 views

How to read coordinates with variable Gauß-Krüger zone (meridian) in QGIS?

Is there a sensible way to visualize coordinates like this as point layer in QGIS? X values starting with 2 are EPSG 31466, 3 is 31467 and 4 is 31468. I didn't try, but i think the same problem will ...
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2answers
132 views

Can I clip vector shapefiles more efficiently?

I have a river shapefile, got from r.watershed module, and it looks like this: I have eight points on the river which I want to analyse, and I only want this river segments:(the second photo below ...
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0answers
76 views

Field Calculator: Error message

Field Calculator: using the x- or yat or (0 "or-1" ) expression, I keep receiving an error: An error occurred while evaluating the calculation string: Index is out of range. I have shut down and ...
2
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1answer
168 views

QGIS “transform error” messages - how to stop them?

In QGIS, I am getting an error message every time I edit a node. Also, there is a lot of lag in performance. The message is: "Transform error caught: forward transform of (10990.308086, ...
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1answer
101 views

Distance-direction computation of lines with exactly/more than two nodes?

A distance and direction tutorial provided as an Answer at How to add Direction and Distance to attribute table? uses: xat (0 ), xat (-1 ) and yat (0 ), yat (-1) for start and end points of lines; ...
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1answer
73 views

How to open a shapefile linked custom metadata textfile within QGIS

I used a text file as a simple metadata for my shapefiles. It has basic information such as Source of raw data, Who can edit the file, Accuracy level, data category, Cost aquiring data, etc. The ...
2
votes
1answer
77 views

Why is “Join Attributes by Location” reporting different CRS (and running forever)

I have a point feature layer with ~240,000 parcel centroids. I have a second feature layer containing ~9000 subdivision polygons. I want to assign the name of the associated subdivision as a new field ...
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1answer
136 views

Different ways of saving color ramps in QGIS (xml, qml, csv), which should I use?

I started to use QGIS for personal mapping as a hobby (specially for planning bike routes), and I notice there are more than one way to use color ramps. There are styles, which can be saved and ...
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0answers
26 views

How do I dissolve to a predetermined number of contiguous geographies based on equal division of a value?

Let's say I have a layer that is the state of Oklahoma, broken up by county, and I want to dissolve it into contiguous regions of roughly equal population size, and I want to define how many regions ...
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2answers
237 views

How to change raster cell values within a polygon using QGIS GUI?

I would like to know how to change the values of raster cells which are within a polygon, leaving all cell values outside the polygon unchanged. I would like to subtract 1.5m from each raster cell ...
2
votes
1answer
299 views

QGIS 2.0 Plugin: Select and Identify a Single Feature

given is a layer with some nodes on it and every node has some attributes(name, id, etc...). For showing up the informations of a single node I can use the "Identify Feature Tool". Choose the tool, ...
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1answer
70 views

Mapinfo and qgis file's datum problem [closed]

please refer to following link for the explanation of the problem I had. do you have any idea on this? ...
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2answers
141 views

QGIS howto create raster from map canvas easily

i have question ho to create raster from QGIS map canvas (what i seen in my qgis) easily. Now i have used print composer and after some luck i get whole dataset into map item, after that i throw lucky ...
0
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2answers
261 views

Batch merge large numbers of.asc grid files

I have >2.5k .asc grid files which I need to merge into a single overarching dataset. I would like to avoid having to convert them into esri grids first so was looking to use QGIS (v.2.0). I am ...
2
votes
1answer
228 views

Qgis & processing doesn't links with Grass, r or saga

After having formatting my computer (W7-64bits), I have re-installed QGIS 2.0.1-64 bits on it . But I can not use GRASS, SAGA or R via Toolbox (or Processing). I have checked the path in the Options, ...
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2answers
137 views

Conversion of diagonally adjacent pixels into one polygon?

I am trying to vectorize a raster whose digital numbers indicate different classes they belong to. ArcGIS and QGIS yield similar results: separate shapes out of pixels sharing the class that are ...
1
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1answer
499 views

QGIS Advanced String Filter Expression returns too many results

"GNR" is a string column and I expect the filter expression "GNR"='.11' to only return the feature with the value '0.11'. Why are the other features with values of '.110'and '.1100' included? Is ...
1
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1answer
204 views

QGIS snapping not working for me

I am new to QGIS, and this is a very basic question. I made a new polygon layer, to trace cadastral boundaries off a raster map. I want the polygon nodes on adjoining acreages to snap together. Some ...
4
votes
2answers
346 views

Binding between QGIS custom form (Qt Designer) and date/time field in a SpatiaLite database table

For my attribute table I created a custom form in Qt Designer. The table has a date field and a time field. In Qt Designer there are widgets for entering date and time. But what data type is expected ...
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1answer
119 views

QGIS Bookmarks not transfering with files

My students send me QGIS map files that when I open them have been stripped of the bookmarks. Is there a setting I'm missing or is the normal case.
0
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1answer
37 views

QGIS map file to be viewed on both mac and pc platforms

Im teaching a class where some students have QGIS installed on their macs and I'm using a pc. Although the file structure is the same mac reference files differently than the pc and I get data link ...
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2answers
99 views

Polygon inside polygon invalid in QGIS

Looking at this map data from naturalearth (part of Oman & UAE to be specific), each country is defined as a multipolygon. In this case UAE (in red) contains two polygons and Oman (beige) three. ...
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0answers
42 views

No visual after loading geotiff in Qgis Dufour

I installed the latest version of QGis 2.0 for mapmaking. Before I used the 1.8 version and I had no problems in loading Geotiffs. With the latest version, it loads the same files but it doesn't show ...
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0answers
26 views

Problems with WMS QGIS 1.8

Hi I have loaded WMS layers previously but i seem to have hit a brick wall. I am trying to load from either the Geological Survey Irelands website (near the bottom of the page): ...
1
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1answer
33 views

Show the changed CRS in the Qgis attribute table

I am a GIS newbie, so bare with me if this is a duplicated question. I could not find the answer anyway. I am using QGis to read a polygon shapefile with a Dutch CRS (EPSG 28992 to be precise). Now I ...
3
votes
1answer
218 views

How to create halo for a text in the composer

I would like to add texts with halo, in the composer (not in the map). Do you know a way to do it? I'm using QGIS 2.0.1 Thank you
2
votes
1answer
176 views

Import of NAS-data, (norm-based data exchange interface)

Is there any possibility to import nas-data in QGIS. NAS (norm-based data exchange interface) is a XML-based format. German cadastral-data is only available in this format.
3
votes
3answers
108 views

How do I split a shapefile efficiently into mutually exclusive sets?

I have a shapefile containing about 240,000 features. I want to split this into five files with no overlaps. My current approach is to write a non-trivial expression that defines the first subfile, ...
0
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0answers
46 views

How to assign no value to pixels with (255,255,255)

I have Imagery where I want to replace white edges (255,255,255) with no value. I have used gdal translate within QGIS and put in no value 255 but this give no value to other pixels eg 255,240,200. ...
0
votes
1answer
195 views

QGIS 2.0 Howto copy raster data from a QgsRasterDataProvider to an OpenCV matrix

I'm hacking the half day arround a problem and that I' thought it was simple one. I'm using C++ (QtCreator) QGIS 2.0 und openCV2 on an 64 bit Workstation runnig Debian Wheezy. The Application I try to ...
0
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0answers
131 views

map with Pacific in center

I would like to create a basemap with the Pacific centered. I have found this threat But it doesn't make sense to me. The last option looks the easiest. When I have loaded the map with all the ...
2
votes
1answer
116 views

Is it possible to create a default workspace in QGIS 2.0?

I have been using QGIS for quite some time. It always happens that I change the position of toolbars and panels to make the workflow more efficient. But then when I close QGIS and I have to start a ...
2
votes
1answer
142 views

Analyse slope gradient from LiDAR .asc data

I'm new to using QGIS. I have purchased some LiDAR data which downloads as .asc format, is there a way to analyse the terrain slope angle from this data or does it need to be converted into DEM? ...
0
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0answers
361 views

On install “Couldn't load SIP module.” - should I reroute Python config or download sip?

(Please note I'm still relatively new to Linux). When I run QGIS after install I get a message 'Could't load SIP module'. I've looked for help and am conflicting advice on what my next step should ...
0
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2answers
98 views

Robust importing of shapefile into spatialite database?

I am trying to import shapefiles into a spatialite database using spatialite-gui. I am having problems with the types of the variables since spatialite-gui has no obvious way to handle shapes which ...
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0answers
14 views

How to export style in sld-format using attribut fields of a shape? [duplicate]

I have some ESRI-Shapes with a .dbf each. In the dbf-File there are attributes like a string. Now i can use one or more attributes to display for example a text on a point by configuring a style. This ...
1
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1answer
82 views

draw multipart polygon with one surrounding border

As you can see on the image below, the waterbody is divided by the border line because it consists of several polygons. I could merge the polygon, but I dont want to change the shapefile. Is there ...
3
votes
0answers
45 views

How to setup default toolbars and menu item?

I need to customize the UI for a group of users at another office. I want to turn off a bunch of toolbars and menus that are not needed. I know how to save my configurations (Settings -> ...
1
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1answer
96 views

Why does the QGIS Profile plugin lack the profile graph?

I've searched but can't seem to find a similar issue with this plugin - the plugin starts ok and seems to run but I don't get any view of the profile or some other buttons in the UI as I've seen ...
1
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0answers
41 views

Geodatabase ESRI in Qgis 2.0.1 [duplicate]

I received data saved as geodatabase from Esri (10.x) and want to open or work with it in Qgis 2.0.1. The files are like following I read a lot in the forum about this subject but still have no ...
0
votes
1answer
1k views

How to export QGIS contour attributes in a DXF file?

I'm new to this. I have a .tiff data file that generates contours in QGis. That's super. I save it as .dxf. The contours don't have any attributes or data. That's bad, because I want to make a 3D ...
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0answers
33 views

Taudem one of the most important tool series doesn't work [duplicate]

Do you know if there is a way to get taudem working in the toolbox. I always get this Oooops! The following output layers could not be open Pit Removed Elevation Grid: ...
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0answers
104 views

QGIS 2.0 crashes: Add Delimited Text Layer

is there no chance to load the extension "Add Delimited Text Layer"? QGIS crashes as soon I try to install this extension. Using QGIS 2.0 on OS X 10.8.5, 8 GB RAM, 1,6 TB free of space… Thanks a ...
2
votes
1answer
105 views

Edit KML with the mouse in QGIS: is it possible?

In google maps, and more recently in Google Maps Engine Lite, you can create a Track/LineString by clicking with the mouse along a route, delete some intermediate point, drag the midpoint of a segment ...
2
votes
0answers
94 views

Joining csv file to vector layer in Processing modeler?

I am trying to join a simple csv file of values to a vector layer within Processing modeler. The match would be on an id held by both files. The csv file has no geometry. I can do this easily in ...
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0answers
181 views

MXD2QGS fails with 'ascii' codec can't encode character

I've tried to convert some mxd files to qgs but, I already have the same error: ": 'ascii' codec can't encode character u'\xe8' in position 57: ordinal not in range(128) Échec de l’exécution de ...
0
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2answers
158 views

QGIS 2.0, SpatiaLite: labels disappear after setting data defined position (x,y)

I added to my SpatiaLite table (.osm-import with the "standard" QGIS-OSM-Plugin) two empty columns x and y (double) to define manually the position of my labels (data defined labeling). But after ...