|
|
| GeoCommunity Mailing List |
| |
| Mailing List Archives |
| Subject: | Re: GISList: question |
| Date: |
04/10/2003 07:30:00 PM |
| From: |
northms .. telus.net |
|
|
Monica,
One possible source of your problem: ArcView 8.x does not read coordinate
system information for an image in the same way that ArcView 3.x does. For
example, what if the image is a GeoTIFF file (with coordinate system
information embedded in the TIFF file) but you also have a world file (TFW)
with different coordinate system information? ArcView 3.x will read the TFW
first, but ArcView 8.x will read the GeoTIFF embedded information first.
For more information on this, see these two ESRI Knowledge Base articles:
http://support.esri.com/search/KbDocument.asp?dbid=14147
http://support.esri.com/search/KbDocument.asp?dbid=18640
Another possible source of your problem could be that the shapefile projection
is incorrectly defined. The shapefile projection information created & used by
ArcGIS 8 is stored in a *.prj file. You can view and edit the projection
information for a shapefile in ArcCatalog. Open the Shapefile Properties
dialog box. Under the Fields tab, select the Shape field. In Field
Properties, click on the ellipse (...) next to Spatial Reference. You can
select a predefined coordinate system here.
For more information on this, do a Search for "Defining a shapefile's
coordinate system" in the ArcGIS 8 Help.
Hope that helps!
sarah
email. northms@telus.net
Quoting Monica Barricarte <monica-barricarte@ca.nacdnet.org>:
> This is Monica again. Thanks to all of you.
> I have another problem.
> I have a raster image and a shapefile, when I open them in GIS 3.2 they
> match
> perfectly and no problems there, but when I try in GIS 8.2 they dont match.
> The
> message box says that they ahave a different geographic coordinate system,
> no
> the projection. I do not know how to solve this problem and make them
> project
> on top of each other. I do not know how to change a geographic information of
> a
> shapefile, I know how to change the projection and reproject but I do not
> know
> where it is the geographic information, thanks a lot!
>
>
>
> To unsubscribe, write to gislist-unsubscribe@geocomm.com
> ________________________________________________________________________
> GeoCommunity GeoBids - less than $1 per day!
> Get Access to the latest GIS & Geospatial Industry RFPs and bids
> http://www.geobids.com
>
> Online Archive of GISList (and numerous others) available at:
> http://spatialnews.geocomm.com/community/lists/
>
> Setup a GeoCommunity Account and have access to
> the GISDataDepot DRG & DOQQ Catalog
> http://www.geocomm.com/login.php
>
>
To unsubscribe, write to gislist-unsubscribe@geocomm.com
________________________________________________________________________
GeoCommunity GeoBids - less than $1 per day!
Get Access to the latest GIS & Geospatial Industry RFPs and bids
http://www.geobids.com
Online Archive of GISList (and numerous others) available at:
http://spatialnews.geocomm.com/community/lists/
Setup a GeoCommunity Account and have access to
the GISDataDepot DRG & DOQQ Catalog
http://www.geocomm.com/login.php
|
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
