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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | GISList: SUM: Raster to Vector |
| Date: |
01/10/2002 01:58:06 PM |
| From: |
Travis G. Smith |
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Listers,
Thanks to everyone who provided me with tips, tricks and guidance
regarding my original posting on raster to vector conversion of
georeferenced TIFF files to vector coverage format (as below).
The most plausible method we found using the tools we have: either
ArcInfo and/or ArcView was as follows:
ArcInfo: First use IMAGEGRID command to convert the TIFFs to GRID
format. Second, use the GRIDLINE command to convert the GRIDs to vector
coverage format. Edit accordingly.
ArcView: Using AV3.2 and Spatial Analyst, you should be able to do a
Themes:convert to grid, then a Themes:Convert to Shapefile.
The only outstanding issue I have is in regards to the quality of the
resulting vector linework after the raster-to-vector conversion. They
are a little pixelated or "stairstepped" in general. If anyone has any
further ideas on how to better "smooth" these to match the original
raster, please let me know.
Spatially yours,
Travis
> Listers,
>
> I have several georeferenced TIF files (and associated .tfw files)
that
> contain polygon features I'd like to get into vector (coverage) format
> so I can clean and attribute them accordingly for delivery. I have
both
> ArcInfo 7.2 - 8.1 and ArcView 3.2 - 8.1 (and Spatial Analyst)
available.
> Could someone please let me know an efficient way to get these
converted
> into vector format while retaining all georeferencing integrity using
> the tools (or additional shareware tools) available to me?
>
> Thanks in advance for any assistance/guidance anyone can offer!!
> Travis
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