[GRASS-user] Importing Vector Data

[Bob Byer]

Thanks Micha and to all that responded.
Best regards,
Bob




________________________________
From: Micha Silver <micha at arava.co.il>
To: Bob Byer <hydrogeo_1 at yahoo.com>
Cc: grass-user at lists.osgeo.org
Sent: Fri, October 16, 2009 4:34:07 PM
Subject: Re: [GRASS-user] Importing Vector Data

Bob Byer wrote:

> All,
>  I work extensively in the state of Delaware and the mapping information that they provide is based on ESRI ID 102257 with an ESRI WKT Name of NAD_1983_HARN_StatePlane_Delaware_FIPS_0700.  As a new user of GRASS, what would be the best way to import that data?  Ultimately, I wish to reproject state plane meters to state plane feet then use those files to import into a MODFLOW project.  Perform the modeling, then export that information back to GRASS for additional processing.
>  
I see in the EPSG database that NAD_1983_HARN for Delaware with units of feet is EPSG code 2880:
# NAD83(HARN) / Delaware (ftUS)
<2880> +proj=tmerc +lat_0=38 +lon_0=-75.41666666666667 +k=0.999995 +x_0=200000.0001016002 +y_0=0 +ellps=GRS80 +to_meter=0.3048006096012192 +no_defs
Does  that exactly match ESRI's 102257?

And the EPSG code for for the CRS with meter units is  2776, as listed at the bottom of your website..

So if you create two locations, one based on each of the EPSG codes, you can then import your data (into the correct location), and reproject to the other location to get units in meters.

> In case there is interest, the web site http://datamil.delaware.gov/geonetwork/srv/en/datadownload
>  Thanks in advance,
> Bob
> 
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