Questions tagged [dpi]
Dots per inch (DPI, or dpi)[1] is a measure of spatial printing or video dot density,
23 questions
6 votes
1 answer
227 views
Poor image quality after using GDAL Translate to delete ortho image layer in USGS Geospatial PDF
I want to delete the orthoimage from a downloaded USGS geo.pdf so that I only have the topo. I run the following command C:\OSGeo4W>gdal_translate "C:\Users\...\Blacksburg_geo.pdf" --...
- 63
0 votes
1 answer
40 views
OSGeo4W version of Qt Designer
I have a scaling problem with the version of Qt Designer in included in OSGeo4W. I have some .ui files that I created with Designer (not the OSGeo4W version). They appear correctly on my high DPI ...
- 6,063
0 votes
0 answers
27 views
QGIS: OSM Labels Disappear with High DPI PDF Print Resolution [duplicate]
When I export an OSM map as a PDF in QGIS with a resolution of 100 dpi, the resulting image looks like this: While the resolution is not great, the OSM labels, such as street names, are clearly ...
- 2,785
1 vote
1 answer
105 views
Using EPSG 900913x2 gridset properly for high DPI display?
I have an OpenLayers map (version 9.1) that consumes GeoServer layers in EPSG:900913 projection (OpenLayers uses the compatible EPSG:3857 as it's default map projection). There are two gridsets on ...
- 714
0 votes
0 answers
47 views
In QGIS Layout "Export as image" predefined settings do not match Page Properties
When setting the Page properties in the Print Layout I expected that these properties are predefined when exporting this Layout as image. But either this seems not to be the case or I am missing ...
- 175
1 vote
1 answer
812 views
How to change the layout DPI for PDF export in QGIS
I am working with QGIS 3.28.4. I have set the export resolution to 300dpi in the layout properties but when I export the layout as a PDF it gets exported at 72dpi. If I export it as png it gets ...
- 11
1 vote
0 answers
218 views
Change the zoom level or detail level of a WMTS map from Swisstopo in QGIS
I'm using QGIS and I'd like to change the zoom level or detail level of my WMTS map. The WMTS connection I'm using is from Swisstopo and the URL is: https://wmts.geo.admin.ch/EPSG/2056/1.0.0/...
- 529
5 votes
1 answer
203 views
QGIS 3.22.1 changelog: physical DPI
The 3.22.1 changelog describes a new feature: Allow using physical DPI for map canvas. Unfortunately, there is no description how to enable this feature. I searched through the QGIS Settings > ...
- 7,938
3 votes
0 answers
808 views
Relation of DPI to QGIS scale
I am trying to use QGIS to generate OpenStreetMap data in an older format (NTF). Since OpenStreetMap is vector, I am currently using Save Map as Image (I also tried a Print Composer) to generate ...
1 vote
2 answers
349 views
OpenLayers: How to shift zoom level content for ol/sourceXYZ about one zoom level
The Swisstopo WMTS service assigns specific raster map content to specific zoom levels: .... 16: 1:25'000 Raster map 15: 1:50'000 Raster map 14: 1:100'000 Raster map .... Here is a code example. ...
2 votes
1 answer
965 views
Correcting canvas DPI in QGIS Windows
I'd like my QGIS map canvas scale to be accurate, e.g. so if the scale is 1:10000, then 100m on the ground should show in 1 cm of screen. My Windows laptop screen has 157 ppi (dpi) based on its ...
- 8,779
0 votes
1 answer
622 views
Changing layout output DPI and dimensions using QGIS Python
I would like to use Python to change the DPI of my map image files, I am not sure where in my code I need to add this line. from qgis.core import QgsProject from qgis.core import QgsPrintLayout from ...
- 225
2 votes
1 answer
1k views
Raster resolution stuck at 96dpi in ArcGIS Pro
I am using ArcGIS Pro 2.5. I have a high resolution raster I've downloaded from a state run imagery site, sid format. I'm trying to export it to a pdf using the native resolution. The dpi is seems ...
- 542
1 vote
1 answer
558 views
Specific WMS request for printing
I wish to use a special wms request for printing only. full request looks like: /geoserver/test_osm/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&...
- 433
0 votes
0 answers
2k views
What it means when choosing a "dpi" when exporting a PDF map in ArcGIS?
I'm trying to understand something when exporting map as PDF file in Esri's ArcGIS for Desktop. The ability to choose paper size. The ability to choose DPI. Thought that those are printer parameters. ...
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