Does anyone know of a way to create a mask for a raster layer using the mouse? I'd like to mask off areas of interest in raster layers that are determined by visual observation.
possibilities:
- QGIS Grass digit plugin to digitise your mask polygon, v.to.rast
- v.digit, v.to.rast
- r.digit
From: "Jason Horn" <jhorn@bu.edu>
Does anyone know of a way to create a mask for a raster layer using the mouse? I'd like to mask off areas of interest in raster layers that are determined by visual observation.
Try r.digit to make a raster by hand. Then name that raster MASK.
-Ian
On Sep 14, 2005, at 8:22 AM, Jason Horn wrote:
Does anyone know of a way to create a mask for a raster layer using the mouse? I'd like to mask off areas of interest in raster layers that are determined by visual observation.
>
What happens if a big asteroid hits Earth? Judging from realistic simulations involving a sledge hammer and a common laboratory frog, we can assume it will be pretty bad.
- Dave Barry
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Jason Horn wrote:
Does anyone know of a way to create a mask for a raster layer using
the mouse? I'd like to mask off areas of interest in raster layers
that are determined by visual observation.
Export the raster to an image format, load it into an image editing
program which supports layers (e.g. GIMP), draw the mask on a new
layer, save it as a separate image and import it.
--
Glynn Clements <glynn@gclements.plus.com>