169 reputation
8
bio website
location
age
visits member for 2 years, 1 month
seen Jul 20 at 5:36

Jul
10
comment Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)
I will then convert them to KMZ files to load on to a GPS which has a maximum file dimension of >1Mp and maximum file size of 3Mb.
Jul
10
comment Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)
@Vince - I want to merge them all to produce on huge continuous raster, then Split them into 999x999 tiles.
Jul
10
comment Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)
@Gerardo Jimenez, black is used elsewhere in the image, as is white, so I can't simply drop those values. Also, because the images are scanned and imperfect, 'white' and 'black' aren't all the same value, as there are slight differences within each colour
Jul
10
asked Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)
Jul
2
awarded  Curious
Apr
8
asked Automating the production of GPS-compatible map tiles from georeferenced raster maps
Aug
14
comment How do I use ranges for raster colour map in QGIS
This works, thanks a lot.
Aug
14
accepted How do I use ranges for raster colour map in QGIS
Aug
14
comment How do I use ranges for raster colour map in QGIS
Putting ranges in the colourmap Value box, e.g. using relational operators like in the example above. It reverts to 0 when the dialogue box is closed and reopened.
Aug
13
comment How do I use ranges for raster colour map in QGIS
I could reclass in QGIS too, using the Raster Calculator. I was hoping to do it from the Styles/Colormap dialogue, though perhaps it will be easier to reclass into a new raster.
Aug
13
revised How do I use ranges for raster colour map in QGIS
added 11 characters in body
Aug
13
asked How do I use ranges for raster colour map in QGIS
Jul
26
awarded  Commentator
Jul
26
comment Unattractive image artefact when exporting from QGIS's Print Composer
Changing the DPI from 300 to 200 or 250 removed the band, but changing up from 300 to 400/500/600 did not.
Jul
26
accepted Unattractive image artefact when exporting from QGIS's Print Composer
Jul
20
comment Unattractive image artefact when exporting from QGIS's Print Composer
I'll try this too, thanks. Will post results when I do.
Jul
20
comment Unattractive image artefact when exporting from QGIS's Print Composer
Yes, now you mention it, I think this happened after I made the base image a little transparent to lighten it.
Jul
20
comment Unattractive image artefact when exporting from QGIS's Print Composer
The base images is from NASA's Blue Marble, and is a single image.
Jul
19
asked Unattractive image artefact when exporting from QGIS's Print Composer
Jul
18
awarded  Organizer