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

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2
votes
3answers
201 views

Imported GPX files into QGIS ver 2.0.1-fields missing?

Just imported GPX file into QGIS.Opened attribute table. where are the following fields? Latitude,Longitude,,symbol,and time . Am I missing something??I used a Garmin Oregon 300 to collect the data. ...
0
votes
1answer
65 views

attribute table in qgis wont save custom values

I am trying to edit a point shapefile in qgis and I have editing on for that layer, I have added a new column for the custom data, I have set it to text and have 8 characters allowed in the column ...
1
vote
1answer
151 views

How can I use Openflights database in QGIS?

I would like to have a shape file with the airports position and the routes of the planes I've found Openfilghts but I can't use it in QGIS. Seems that the format of the DB .dat is not supported by ...
0
votes
2answers
77 views

Show only some buildings

How do I show only some buildings? I only need to show 3 cabins in the forrest, but not every house in the whole village around, and the city close by. Maybe some of the symbol buildings in the city ...
3
votes
1answer
255 views

Show alternating contour lines

Is it possible to show only every other counture line? And how do you do that? (Im new to QGIS Lisboa 1.8.0, but even newer to QGIS Dufour 2.0.1, but have used ArcGIS a bit a while ago, and also ...
0
votes
1answer
38 views

How can i find shrines nearby location [closed]

How can i find shrines/complex/institute nearby location in qgis and highlight them. The below image is similar to my shape files which contains all information of all attributes,i don't know python, ...
1
vote
2answers
1k views

QGis 2.0.1 mapserver extension missing

I tried to export my Qgis projects to mapserver, using RT mapserver extension, because there is not any other extension in my version of QGis.(QGis 2.0.1 Dufour on ubuntu 12.04 LTS). After installing ...
3
votes
1answer
676 views

How to display an elevation profile and store the DEM elevation back to the KML line?

When I draw a track in Google Earth, for example along a road, I can right-click it to "Show elevation profile", and it displays a 2D plot of distance vs elevation. However, if I save the KML, the ...
1
vote
1answer
78 views

KML file saved from KMZ missing tabular data

I saved a KML file in Google Earth from this KMZ ... https://www.rampp-team.com/documents/pennsylvania/watershed/LowerSusquehanna/lancaster_pa/Lancaster_CSLF.zip . Upon opening the KML file in QGIS, ...
1
vote
1answer
202 views

Apply r.neighbours or Neighbourhood analysis (LecoS plugin for QGIS) to 3000 rasters

I need to apply r.neighbours or Neighbourhood analysis (QGIS plugin LecoS (or equivalent) to 3000 rasters and define a neighbourhood of 5 x 5 and calculate the mean. I suppose I need to create a ...
2
votes
1answer
325 views

Why do Print composer templates not save my maps in their entirety?

I have been using QGIS and its various updates in a limited way to make maps for a few years now, but I have always had the same problem with the Print Composer. I make my layered maps with grouped ...
6
votes
1answer
1k views

Syntax of conditional statements in QGIS Field Calculator(s)

I have a shapefile which I need to modify. There is one column "CLASS" with the attributes: "A", "B" and "C". I need to change "A" into "1!, "B" into "2" and "C" into "3". I tried it with case when ...
1
vote
0answers
50 views

How to sort SLD file for BGS Digimap provided by Edina?

Does anyone know how to sort the sld files provided here: http://digimap.edina.ac.uk/webhelp/geology/using_data_with_gis/legend_files.htm The reason I ask is that I only want to display the ...
1
vote
0answers
130 views

Where does QGS write its error log messages?

I want to read and copypaste the error log for the crashes I am experiencing in QGIS 2.0. The error I am getting freezes QGIS so I have to ctrl-alt-del. I can see the last mesasge in the panel, but ...
2
votes
1answer
141 views

Why are my symbols not displayed correctly in the legend and after a PDF-Export?

I work with QGIS 2.0.1. I have two problems with the representation of symbols. The first problem is that after I selected a symbol with the type: font and adjust the size of the symbol with the ...
1
vote
3answers
196 views

How ensure data put into PostGIS gets proper CRS attached?

I recently had an intractable problem that we finally traced back to the fact that some points in a PostGIS table had a CRS associated with them and others did not. This resulted in some points being ...
3
votes
3answers
80 views

How do I create a map that is not to scale in QGIS?

I want to make a map that isn't to scale and I'm so used to being pedantic about CRS and scale that I don't know where to start. The map that I need to make is a simple guide for people to get to a ...
5
votes
2answers
702 views

Rendering and Labeling Shapefile with PyQGIS

I've been running into a few problems working with the QGIS API for python. I've gotten more comfortable working in the python console in QGIS but I run into problems when I try to run the code ...
1
vote
0answers
32 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 ...
1
vote
0answers
130 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
vote
0answers
57 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
votes
3answers
211 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 ...
1
vote
2answers
134 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 ...
0
votes
0answers
88 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
votes
1answer
186 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, ...
0
votes
1answer
104 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; ...
0
votes
1answer
79 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
85 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 ...
1
vote
1answer
179 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 ...
1
vote
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 ...
1
vote
2answers
275 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
377 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, ...
-1
votes
1answer
73 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? ...
1
vote
2answers
166 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
votes
2answers
343 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
260 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, ...
0
votes
2answers
154 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
vote
1answer
661 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
vote
1answer
262 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
388 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 ...
1
vote
1answer
144 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
votes
1answer
39 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 ...
1
vote
2answers
116 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. ...
0
votes
0answers
44 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 ...
0
votes
0answers
28 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
vote
1answer
35 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
270 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
220 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
110 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
votes
1answer
233 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 ...