Feature request #19470

GDAL rasterize - add support for "burn in" to existing rasters, 'add' parameter

Added by Rijk Zuurmond over 2 years ago. Updated about 2 years ago.

Status:Open
Priority:Normal
Assignee:Giovanni Manghi
Category:Processing/GDAL
Pull Request or Patch supplied:No Resolution:
Easy fix?:No Copied to github as #:27298

Description

missing -add function in GDAL_rasterize

after-gdal-rasterize.jpg - result after gdal_rasterize (from qgis 2.18) (427 KB) Rijk Zuurmond, 2018-07-25 10:01 AM

polylines.jpg - orginal shapefile with limited number of lines (417 KB) Rijk Zuurmond, 2018-07-25 10:01 AM

qgis2.18_menu_GDAL-rasterize.jpg - option menu from qgis 2.18 (308 KB) Rijk Zuurmond, 2018-07-25 10:01 AM

History

#1 Updated by Nyall Dawson over 2 years ago

  • Tracker changed from Bug report to Feature request
  • Subject changed from GDAL_rasterize to GDAL rasterize - add support for "burn in" to existing rasters, 'add' parameter

#2 Updated by Nyall Dawson over 2 years ago

The algorithm does not current support altering existing rasters, and only allows creation of new rasters. The 'add' mode only makes sense when used with updating an existing raster.

#3 Updated by Rijk Zuurmond over 2 years ago

i'm using it to create (raster)heatmaps from a large set of tracks (shape polylines),
this future is available in version 2.18

jpg added: menu from 2.18, orginal shapefile and resulting raster

#4 Updated by Giovanni Manghi over 2 years ago

  • Assignee set to Giovanni Manghi
  • Category changed from GDAL Tools to Processing/GDAL

it seems that on QGIS LTR the tool was split in two, one allowing this operation, so it would be better to re-add it also in qgis 3.

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