Opened 11 years ago

Closed 10 years ago

#880 closed defect (fixed)

Colour reduction of png tiles looks bad in detailed areas

Reported by: Thomas Wood Owned by: jburgess777@…
Priority: trivial Milestone:
Component: mapnik Version:
Keywords: Cc:

Description

Colour reduction of tiles is performed to reduce filesize, under some conditions this is detrimental to the look of the map. http://openstreetmap.org/?lat=51.369&lon=-0.1442&zoom=13&layers=B0FT http://openstreetmap.org/?lat=51.36966&lon=-0.15639&zoom=15&layers=B0FT

At low zoomlevels the mismatching of colours can be particularly obvious.

Change History (4)

comment:1 Changed 11 years ago by Tom Hughes

Owner: changed from Tom Hughes to jburgess777@…

comment:2 Changed 10 years ago by jburgess777@…

Owner: changed from jburgess777@… to jburgess777@…

comment:3 Changed 10 years ago by jburgess777@…

There was a fix in Mapnik a little while ago which dramatically improved the colour reduction algorithm. The examples given above look OK to me now.

comment:4 Changed 10 years ago by jburgess777@…

Resolution: fixed
Status: newclosed
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