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

5 votes
1 answer
626 views

QGIS layer in .svg or with a better resolution?

I have a georeferenced layer, built from a nice map drawn with Inkscape. But when I convert it to *.png, *.jpg or *.tif, there is a pixelisation of the map. After georeferencing, it gives a pixelised …
catindri's user avatar
  • 351
1 vote
0 answers
899 views

How to fill empty pixel from DEM using QGIS?

in QGIS ? When I load it, and zoom to a big scale, some pixel without any value appear. … 3DEM on this link in french http://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Atelier_graphique/Didacticiels_cartographiques/Didacticiel_de_cr%C3%A9ation_de_carte_du_relief_bitmap But is it possible with Qgis
catindri's user avatar
  • 351
1 vote
1 answer
2k views

QGIS3 data defined overide not active

In QGIS 3.4 MADEIRA, I get no active "data defined override"; I click on the sybol right toio "Size", that I want to modify with a function. …
catindri's user avatar
  • 351
13 votes
4 answers
11k views

Choosing only one contour line to label in QGIS?

Is it possible to select only one contour line for labelling? I have numerous labels for each line and I'll prefer to label only the main ones, such as 1000 m and 1500 m
catindri's user avatar
  • 351
2 votes
1 answer
227 views

QGIS very slow and stops when increasing points size / number

It works well but QGIS takes more than 30 minutes to display and the same time to save the map using composer. It often just stops. Is there another way, faster, to get this result? … I'm using QGIS 2.12. Here a part of what I would like to obtain (using increasing markers size...) …
catindri's user avatar
  • 351
1 vote
0 answers
76 views

QGIS Extract elevation data only for one country [duplicate]

I found some thing for matlab extract only the elevation of a country but not in QGIS. I'm thinking of using a polygon, but I am not familiar with how to do so. …
catindri's user avatar
  • 351