[GIS] Printing High Resolution Open Maps

print-composerprintingqgisresolution

I hope my question does not silly but I am QGIS rookie and am really struggling to find a solution.

I have the added the Google Street Layer to my project on top of which I worked with my points and polylines.

I am using the composer to print the final map in a pdf format. My shape files get printed very well however the google openmap layer has very large pixels. And this is only for an A4 size. Imagine how it will look for larger sizes such as A1 or A0.

This is a link to the pdf file in my Dropbox should you like to check how it looks: https://dl.dropboxusercontent.com/u/102908644/QGIS/Test.pdf

Is there a solution to fixing the resolution issue when printing the maps?

Best Answer

You can make screen copies of the Openlayers background (without your vector data) in higher zoom levels with File -> Save picture as...

In a next step, you can stitch several screenshots together to get a raster file with the same zoom level you used, but greater than one screen.

If you use that as background instead of the Openlayers tiles, you get a higher resolution background for printing.

Only thing I do not know if this is according to the license policy of Google and bing.

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[GIS] Why do quickmapservices basemap labels shrink when printed

Well, you could use a program named MOBAC to create an Atlas of raster tiles at the Zoom you want by using the WMS of the basemap you selected. Since the data extracted is georeferenced this should be quite easy. Your basemap might even be included in the starter pack from what i see, so no need to tinker with some XML queries if you're lucky. Be carefull however, do set your output data and format right before using MOBAC. Make sure you've got my sqlite database as your output, i find it easier to load that way.

If the WMS isn't already set you'll need to go inside the mapsources folder inside MOBAC and create a new xml file containing the following informations:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <customWmsMapSource>
  <name>Name inside MOBAC</name>
  <minZoom>0</minZoom>
  <maxZoom>18</maxZoom>
  <tileType>TIF</tileType>
  <version>1.1.1</version>
  <layers>wanted_layer's_name_here</layers>
  <url> Url of the wms </url>
  <coordinatesystem>wanted output coordinates system</coordinatesystem>
  <aditionalparameters></aditionalparameters>
  <backgroundColor>#000000</backgroundColor>
</customWmsMapSource>

Another way to solve your issue is to simply use the function export as image built in QGIS to export your basemap visualisation, without the vector data you've applied to it, as a Tif tile.

Their has to be some faster way to do this thaugh.

Best Answer

Related Solutions

[GIS] Why do quickmapservices basemap labels shrink when printed

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