Re: [Geotools-gt2-users] Raster to vector conversion - Java proof-of-concept attached

[Ferdinando V. <fer...@uv...>]

Grazie Andrea for pointing to the rasterization algorithm - what I was
playing with was very different, a recursive bisection thing that was lots
of fun to write but likely 100 times less efficient ;-) I'll give this a
spin this week and will post my results. I need both algorithms to work
reliably for well-behaved cases in a couple of months, so that's my
timeline. If at some point anyone decides to take them up for integration in
geotools, let me know so I can use the geotools version and stop playing
with them in my own codebase. Again, I'm all but a GIS guru so my choices
will need careful review.

I'll make sure to mention at least the known authors/contributors in the
credits - if it comes from the original Grass the root authors were probably
either Jim Westervelt or Mike Shapiro. Both old friends - I'll look at the
grass source and if it's still unclear, I'll shoot them an email.

Cheers,
ferdinando

-----Original Message-----
From: geo...@li...
[mailto:geo...@li...] On Behalf Of
Andrea Aime
Sent: Monday, March 31, 2008 4:43 AM
To: andrea antonello
Cc: Ferdinando Villa; geo...@li...
Subject: Re: [Geotools-gt2-users] Raster to vector conversion - Java
proof-of-concept attached

andrea antonello ha scritto:
>>  I remember a discussion a few weeks ago about the need for
>>  vectorization of rasters in geotools. Andrea Aime pointed to some
>>  JGrass code (port of Grass' r.to.vect) and people offered to test the
>>  algorithm for Geotools.
> 
> Aime wrote the original algo in GRASS, I started the port to java :)

In fact I just fixed some bugs in that module, someone
else wrote it (can't remember who).
Cheers
Andrea

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