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

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3
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1answer
249 views

How to match google openlayer and shapefile data?

i've installed openlayers plugin and opened google satellite layer in qgis. for a point in beijing china. it's show 12961957,4852605 coordinate in blew status bar. and it should be ...
0
votes
1answer
238 views

How to create one print layout with 3 different maps of the same area?

I have a problem with the Qgis print composer: I want to create a print layout with 3 different statuses of the same geographical area, stylizing with 3 different fields. So far everything works but ...
1
vote
1answer
705 views

QGIS 1.8 in Linuxmint 14 (Ubuntu 12.10)

I have Linux Mint 14 KDE which is based on Ubuntu 12.10 Quantal. In the QGIS download page, there's no "Quantal" repositiries. I'm trying to use the "Precise" repositories, but I'm not allowed to ...
1
vote
1answer
404 views

QGIS - adding timestamps to spatialite data during data collection

I am trying to do field data collection using QGIS. One of the features that I regard as necessary for data management is timestamps. For example, a timestamp can indicate that an inspection record ...
7
votes
1answer
1k views

Is SpatiaLite or SQLite Spatial an Accepted Standard?

The reason why I ask this is because I have been undertaking some testing and have found that there seems to be many implementation and not all of them are interchangeable. For example: FME can read ...
1
vote
1answer
5k views

How can I convert/transform coordinates from ETRS89 to WGS84 Utm 36N in QGis

I am a student and just getting to know qgis. At the momment I have to combine data which had been measured in ETRS89 with data in WGS84 UTM 36N. I created several vektorlayers for the data in ETRS89. ...
2
votes
2answers
133 views

How to adjust raster size for usage in raster calculator?

I want to make a visibility analysis of planned wind turbines in my region. I have a DEM raster and a polygon describing the possible area where the wind turbines might be set up. People are ...
3
votes
2answers
1k views

How to set proportional value in legend?

I have a GIS table with traffic flows.The thickness is proportional to the traffic value and I'd like to have a little legend with 3 links proportional to setted value (eg: link1 proportional to 100 ...
1
vote
1answer
272 views

PostgreSQL/GIS table relations in QGIS 1.8.0

I am building a database in PostgreSQL 9.2 with the PostGIS 2.0 extension. The database consists of a schema called Water which contains water related geographic features (as example, boreholes and ...
0
votes
1answer
214 views

How to make a Marker moving along the line in QGIS?

I have some questions about simulator moving on the QGIS map. On a vector layer, selected some points to make a polyline, and, let a Vertex Marker moving along the polyline. Now, I want to moving the ...
0
votes
1answer
183 views

connect signal to function with arguments

Hello I have this function on python that take 2 arguments: def niveau(controName,idNiveau): ........ I want to connect it to this signal: ...
2
votes
1answer
278 views

How many active QGIS users are there in total?

I'm the CEO of MangoMap which is a online GIS data management and web map publication platform, we're big QGIS fans and make extensive use of it. We would really love to integrate MangoMap more ...
1
vote
1answer
276 views

What is the correct coordinate system for google geocoded text file layers?

When importing a text file containing lat/longs geocoded from something like GPSVisualizer.com into QGIS, what is the correct coordinate system to select? Most web services (GpsVisualizer included) ...
1
vote
0answers
194 views

Can QGIS Measure Line tool compute correct geodetic distance?

As I understood, this tool normally shows distance in the project CRS units, not the geodetic meters (despite it actually says the distance is in meters). However, now I read (Section III, 4 - ...
3
votes
0answers
137 views

Can extracting raster values work in polygons' CRS without raster resampling?

I am trying to extract raster values using polygon layer with different CRS. Raster is in WGS84 (EPSG:4326) and the polygons in UTM (EPSG:23031). 1. If I want to work in the projection of the ...
0
votes
1answer
234 views

Sum of values within a buffer polygon

I need to do the following in QGIS and hope so much anyone could help. I have a vector layer with points. Each point represents a firm with the number of employees in the attribute table. I want to ...
0
votes
1answer
391 views

Define transparent color in singleband pseudocolor raster layer style

Can I somehow define "transparent" color for values higher than 32000 in raster layer? See the style dialog:
1
vote
0answers
219 views

How do I edit a shapefile DBF to repair an extra row?

Something got screwed up and now the rows of my DBF beyond #1210 are offset by one, meaning that each shape has the attributes that should be assigned to the next shape. If I were in a spreadsheet ...
4
votes
2answers
3k views

How do you import a .SHP into Sketch-Up?

Does anyone know how to use a .SHP in Trimble Sketch-Up? I have tried exporting to KML and CAD from QGIS, but the KML file doesn't read in Sketch-Up. Thanks! -m
0
votes
0answers
48 views

How can I import layers into a database?

According to the QGIS User Guide (release 1.8.0, page 203/204) I only have to drag a layer from the QGIS Browser to the DB Manager. But for me this does not work.
0
votes
4answers
316 views

Buffer in QGIS/R is 650-670 m wide instead of 500 m

I am trying to make a 500 m buffer for my polyline layer. Unexpectedly, I receive buffer varying from 650 to 670 m, depending on location. As many resources recommend to use UTM before making a ...
5
votes
1answer
457 views

QGis Zonal Statistics Plugin NoData included in Calculations

I have been trying to use the QGIS zonal statistics plugin. My raster has a nodata value of -99999 and all other values are positive. After computing the mean zonal statistics there are a number of ...
1
vote
1answer
422 views

QSpatialite : import multiple TXT/CSV

I'm using QSpatialite only. I don't have spatialite-gui neither the shell. I want to import multiple TXT/CSV at one time. How is it possible to do that ? I found nothing on the internet. Thanks
2
votes
1answer
546 views

How to align (georeference) images using QGIS?

I'm completely new to all this. I'm trying to make a map of Han dynasty-era China for a mod for a game called Crusader Kings 2. I've downloaded QGIS and Natural Earth 2, but I need this image to ...
1
vote
2answers
235 views

Exporting raster data from QGIS in chosen projection

EDIT: it is seeming like some of the time my last method will lead to a correct projection, some of the time it will not. Unsure what's happening there but at least trial and error will get me ...
0
votes
0answers
53 views

Vector grid out of range

I'm working with QGIS 1.8.0 trying to do some vector grid to a map. This shapefile (the original is a zip and has the following files .dbf, .prj, .sbn, .sbx, .shp, .shx) has some strange CRS and I ...
3
votes
1answer
416 views

What's the unit of measurements produced by “sum line lengths”?

My goal is to find the total length of roads per county for a particular state. You would think there would be a simple government spreadsheet with this information in it.... I cannot figure out how ...
2
votes
1answer
488 views

Looking for a tool that will place the cursor to a specific x,y coordinate

I am a new user to Quantum GIS. I am looking for a tool/function that will allow a user to type in coordinates, and place the cursor on that exact position. This is for navigation in the field... ...
0
votes
0answers
26 views

Dwg to shp in Geoserver [duplicate]

I am trying to load dwg in geoserver and show it in openlayers, so I saved the dwg as dxf with autocad. Then I used qgis to save the dxf as shp. But when I am trying to load the shp with geoserver ...
3
votes
1answer
193 views

How to select all multipoint features from a point layer?

I'm connecting to WFS layer by qgis. On some layer I've got points features and few multi-point features. Whole layer contains about 1000 features, how can I do some query just to know which features ...
0
votes
1answer
51 views

Sampling from interpolated data layer

Im working with QGIS 1.8.0 and wanted to ask you how can I assign to each of the small squares of the map (I have the coordinates of the center each of them) values from an interpolated data layer as ...
2
votes
1answer
802 views

QGIS python - reference a layer in the table of contents

I'm trying to create a plugin for QGIS using python, But need some help. I want to 1.Zoom to a layer and 2. make the layer visible(switch off or on). But I have managed to zoom to an active layer by ...
2
votes
2answers
3k views

How to draw bar diagrams on the map?

I need to draw simple histograms in QGIS version 1.8 linked to data from an imported DB. I need a double bar diagrams (eg: male/female - in/out) but I only find the possibility to set pie charts. Is ...
0
votes
1answer
130 views

How can I mosaic raster data which have different number of bands ( 3 and 4)?

I would like to mosaic 100 raster data. several raster data's band are 3, though last data have 4 bands. How can I mosaic raster data which have different number of bands?? If somebody knows how to ...
1
vote
0answers
671 views

Why can't QGIS connect to MS SQL Server?

All, Up until yesterday, QGIS connected to my SQL Server 2012 database no problem. However, yesterday I installed SQL Server Management Studio (SSMS), and the SQL Server Client tools, and now I get ...
0
votes
0answers
179 views

Convert shape file to KML on QGIS

I want to convert a shapefile to a kml using QGIS. When I do it, the output I obtain is without atributtes. And I want a similar product as it is provided by shape2kml of zonum solutions. Thanks in ...
3
votes
1answer
235 views

Divide shapefile

I'm new working with QGIS 1.8.0 and wanted to know if its possible to subdivide a map (shapefile, which is round-like) into small squares but following the outer round contour of the map? I tried with ...
0
votes
0answers
1k views

How can I create new shapefile in QGIS1.8 from “Save selection as…”

when select a shapefile feature from census boundary file and use "save selection as" to create a new shapefile, program returns error: "Export to vector file failed. Error: creation of layer failed ...
2
votes
0answers
70 views

Moving legend items up and down in QGIS

How can I change sort order in layer properties styles tab? The only way I've found is to change their labels and order by it.
1
vote
1answer
59 views

How to work around “OGR-failure while deleting field 13. Invalid field index”?

this post might be related to this one: QGIS Field Calculator Results Removed When Saving Edits But there is no suitable answer for me It is not allowed to ask another time in the other post I ...
1
vote
1answer
83 views

Move shared vertices together

I should move some vertices of a polygon to fix the boundaries of a country, how can I do it while keeping the adjacent polygons still connected? Is there a way to anchor permanently overlapped ...
1
vote
1answer
188 views

Add buffer only on one specific side of polygons

I have a shapefile with multipart geometry (multipolygons), namely communities (blue on the picture below). There are also lakes (white), but for these I don't have a geometry, they're just "empty". ...
1
vote
2answers
462 views

How to best set up QGIS for GDA 94 zone 55 (Australia)

I am looking for help on the best way to set up QGIS for GDA 94 zone 55. (i.e. all the relevant settings etc.)[1.8 in lieu of 2.0] Am working off Garmin GPS/gpx data in GDA/UTM format (I accss this ...
1
vote
0answers
134 views

QGIS GPS bluetooth connection

I have setup a Haicom bluetooth gps on a machine running Windows8 and have used GPSGate to create some virtual COM ports. I have valid data arriving at the COM port, but then I run QGIS and try to ...
3
votes
2answers
1k views

Local Tile Cache in QGIS

I was wondering if there is a way to load a local tile cache (ie: MB Tiles etc.) of imagery that is sitting locally into QGIS? I am hoping to use some tablets for field verification and would like to ...
1
vote
0answers
90 views

QGis Cloud Real Time Data

Through Qgis 1.8 i have a layer whose data are updated every 3 seconds.But the question is whether it is possible that QGis Cloud represents dynamically these changes. Thank you very much
1
vote
1answer
5k views

How do I import AutoCAD [DWG] drawings to QGIS [SHP] using the right CRS settings?

We did some topographical surveys in Indonesia which are drawn in AutoCAD. It's our aim to publish them with QGIS and its webclient. I thought the best way is to georeference the data in AutoCAD ...
1
vote
1answer
114 views

Stop custom attribute form from resizing in Qgis

When I open a custom attribute form for a feature in Qgis it always gets resized to the default size of the original Qgis attribute form. I've tried to set the sizePolicy in QT Designer to Fixed ...
4
votes
2answers
476 views

How to add a layer group using pyQGIS?

Good morning, I would like to know how I can create a new group in the layer manager using python code, someone could help me?
0
votes
0answers
40 views

HTML framework in GIS development version

I have a question. I need to insert an HTML frame in the QGIS developer version. That works very well. Now I will also create a title page as HTML. Now my question is which program I best create the ...