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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | RE: GISList: Sum: ArcGIS and MrSID + ECW |
| Date: |
09/13/2001 06:34:01 PM |
| From: |
Tong LIM |
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Tim,
FYI, there is a free ArcGIS 8.1 ECW plugin available at www.ermapper.com,
this plugin allows you to read ECW images and/or compress images in other
formats into ECW format. The compression limitation in this free plugin is
500MB input size but unlimited compression can be done in ER Mapper.
Hope this is of interest and help to you.
Regards,
Tong LIM
Australasian Business Manager
Earth Resource Mapping
65 Hume St, Crows Nest, NSW, AUSTRALIA 2065
Tel: + 61 2 8437 6202 Fax: +61 8 9388 2901
http://www.EarthEtc.com, http://www.ermapper.com
Want to see the latest press releases? Go to
http://www.ermapper.com/cgi-bin/press/index.cfm
> -----Original Message-----
> From: Tim Mangum [mailto:tvmangum@co.randolph.nc.us\
> Sent: Friday, September 14, 2001 2:26 AM
> To: GIS List: ESRI List
> Subject: GISList: Sum: ArcGIS and MrSID
>
>
> Thanks for everyone for their help on this problem. We were able to figure
> it out on this end. However, due to the events in New York and
> Washington DC
> I have not been in too big of a hurry to post a response.
>
> The problem was that the world file with the MrSID image was
> corrupt. We had
> deleted the MrSID image from the hard drive but not the world file. In
> addition, ArcGIS was reading each pixel in 1 foot increments instead of 2
> foot increments. Once we corrected all of this, everything worked fine.
>
> During all of this we did uncover something else on the ESRI website which
> you might find helpful. It is article 18293.
>
> FAQ: Why doesn't ArcMap use a MrSID file's internal georeferencing?
>
> Answer: Reading the internal georeferencing of a MrSID file is unsupported
> functionality in ArcGIS 8.1
>
> Wonder why it is that way?
>
> Thanks for all of the suggestions!
>
> Below is the original query.
>
> I have got a rather "interesting" problem. I am using ArcGIS 8.1. In
> ArcMap I have a map document with the data frame being projected at
> NC State Plane 1927 and all the layer are at the same projection.
> Everything works fine until I add the MrSID image of the County. It
> shows up over 5 miles to the south west of the County. I have checked
> the projection of the image and I have set it to the projected
> coordinate system of NC State Plane 1927 and have set it to the
> geographic coordinate system of North America State Plane 1927 and
> neither one seems to make that much of a difference.
>
> I looked at the coordinate systems info for the MrSID image and
> noticed that the central meridian, standard parallel 1 and 2, and the
> latitude of origin was different from all of my other layers. I changed
> these items to match the other layers and it did help a little but the
> image is still not laying over the County. The only other thing we can
> think of is that the extent of the MrSID image is off. We have looked
> at the other layers extent and have noticed that the MrSID image
> extent coordinates are off. Is there a way to correct this problem? We
> are all stumped on this one.
>
> Thanks for any help and suggestions.
>
> Tim Mangum
> Property Development Technician II
> Randolph County Planning & Development
> P O Box 771
> Asheboro, NC 27204
> Phone: 336 318-6554
> Fax: 336 318-6550
>
>
>
>
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