[GRASSLIST:3243] Rastering

[J.c.m. van der Kwast]

Hi everybody,

For some time now I'm wrestling with the rasterization of thin 
linear/area objects. The case is as follows, xy projection, area 5000 x 
5000 m (or units), grid 1 x1. I've got thin areas of 3 m wide and trying 
to raster them. I would expect to see them as thin linear objects in a 
raster map of the whole area. But the areas are broken. When zooming in 
extremely then the areas seem to form lines or areas again, but are they 
continuous? Maybe it has something to do with the scale?
When given a z value and patched with a dem, the dem is correctly 
displayed but the thin areas are broken into pieces (as they are in the 
whole raster map). Does it mean that I should divide the map up into 
small portions with a desirable resolution, raster them and patch them 
back together in the desired resolution? Personnally I don't think it 
will help as the areas formed do not seem to be continuous. 
Some time ago I wrote a mail with the title landscape. The problem is 
much the same, only with rastering linear features. As my background is 
not GIS (but agriculture) it could be I'm trying to do something which 
isn't possible at all. But looking at it logically, a feature of 1 cell 
in a grid of 1 x1 should at least take the value I've given it. If it 
doesn't show up at the screen I can live with it. Problem is, it does 
sometimes will and sometimes won't show up.
I've been playing around with a lot of functions and manuals but still 
this puzzles me greatly. If anyone has any answers, I'd be most grateful,

Warm regards,

Sjors