raster images
Cummings, Mike
How do I go about opening/importing a .sid raster image in MI 8.0? Everything I’ve tried has failed.
Ben A Greenberg
From: mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of Cummings, Mike
Sent: Tuesday, March 30, 2010 4:31 PM
To: mapi...@googlegroups.com
Subject: [MI-L] raster images
How do I go about opening/importing a .sid raster image in MI 8.0? Everything I’ve tried has failed.
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Cummings, Mike
Based on the help I should be able to use File>open>raster..it creates a .TAB file but when I try to open it; I get the message:
The image control points cannot be in a straight line. Unable to open table <table name>.
Ben A Greenberg
Based on the help I should be able to use File>open>raster..it creates a .TAB file but when I try to open it; I get the message:
The image control points cannot be in a straight line. Unable to open table <table name>.
From:
mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of
Ben A Greenberg
Sent: Tuesday, March 30, 2010 2:37
PM
To: mapi...@googlegroups.com
Subject: RE: [MI-L] raster
images
I not sure about V8.0, but earlier versions required you to install a Mr SID raster handler file (i'm pretty sure).
From:
mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of
Cummings, Mike
Sent: Tuesday, March 30, 2010 4:31 PM
To:
mapi...@googlegroups.com
Subject: [MI-L] raster images
How do I go about opening/importing a .sid raster image in MI 8.0? Everything I’ve tried has failed.
Gentreau
Based on the help I should be able to use File>open>raster..it creates a .TAB file but when I try to open it; I get the message:
The image control points cannot be in a straight line. Unable to open table <table name>.
From:
mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of
Ben A Greenberg
Sent: Tuesday, March 30, 2010 2:37
PM
To: mapi...@googlegroups.com
Subject: RE: [MI-L] raster
images
I not sure about V8.0, but earlier versions required you to install a Mr SID raster handler file (i'm pretty sure).
From:
mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of
Cummings, Mike
Sent: Tuesday, March 30, 2010 4:31 PM
To:
mapi...@googlegroups.com
Subject: [MI-L] raster images
How do I go about opening/importing a .sid raster image in MI 8.0? Everything I’ve tried has failed.
Cummings, Mike
While the web page says that it can open *.sid files it doesn’t seem too. I selected Raster image & open—the *.sid aren’t listed.
Any other suggestions?
Gentreau
Mats Elfström
The problem is unclear.
1 Can you open the sid file as an image in MI Pro? (i e unregistered)
YES: Then the problem is not the raster handler.
NO: Your MI Pro cannot handle sid files. Open it in a sid file viewer and resave it to a tif file.
2 Does the image show up in the wrong location, or distorted?
YES: The registration is wrong, or done assuming a wrong projection. Redo the georeferencing.
There is no direct equivalent between a world file and a georeferencing tab file. The tab file can have many control points and all contribute to fit the image as best as possible. The control points does not have to be image corners, but needs to be evenly distributed across the image. The more control points, the better the registration.
The world file relies on one image corner control point only and the cell size. So any translation between the two must compute new data, according to the current projection and coordinate system.
HTH Mats.E
--
______________________________________________
Mats Elfström, Väpplingvägen 21, SE-227 38 LUND, Sweden
tel: +46 46 145959 / mob: +46 70 595 39 35
alt e-mail: mats.e...@telia.com
Cummings, Mike
That was the problem. Once I figured out the coordinate system, changed MI to match & I could create the TAB & view the SID.
Thanks All.