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Re: create geotiff [message #56004 is a reply to message #56002]

Wed, 26 September 2007 07:51

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

David Fanning wrote:
> kBob writes:
>
>> All those values can be found in the "GeoTIFF Format
>> Specification" ...
>>
>> http://www.remotesensing.org/geotiff/spec/geotiffhome.html
>
> I guess what I meant was, what do those things in the spec mean!?
> For example:
>
> ProjectedCSTypeGeoKey: 32767, $ ; (user-defined)
>
> What the heck is Projected CS Type and why is it user-defined
> in this case? God knows I'd *try* to define it if I knew what
> the hell it was! :-)

Well, there's a rather exhaustive list of the various types at the mentioned site above.
Google can help explain the acronyms, e.g. CS == coordinate system (and there's a glossary
at the ned of the spec.)

http://www.remotesensing.org/geotiff/spec/geotiff6.html#6.3. 3.1

6.3.3.1 Projected CS Type Codes

Ranges:
[ 1, 1000] = Obsolete EPSG/POSC Projection System Codes
[20000, 32760] = EPSG Projection System codes
32767 = user-defined
[32768, 65535] = Private User Implementations
Special Ranges:
1. For PCS utilizing GeogCS with code in range 4201 through 4321: As far
as is possible the PCS code will be of the format gggzz where ggg is
(geodetic datum code -4000) and zz is zone.
2. For PCS utilizing GeogCS with code out of range 4201 through 4321
(i.e. geodetic datum code 6201 through 6319). PCS code 20xxx where
xxx is a sequential number.
3. Other:
WGS72 / UTM northern hemisphere: 322zz where zz is UTM zone number
WGS72 / UTM southern hemisphere: 323zz where zz is UTM zone number
WGS72BE / UTM northern hemisphere: 324zz where zz is UTM zone number
WGS72BE / UTM southern hemisphere: 325zz where zz is UTM zone number
WGS84 / UTM northern hemisphere: 326zz where zz is UTM zone number
WGS84 / UTM southern hemisphere: 327zz where zz is UTM zone number
US State Plane (NAD27): 267xx/320xx
US State Plane (NAD83): 269xx/321xx
Values:
PCS_Adindan_UTM_zone_37N = 20137
PCS_Adindan_UTM_zone_38N = 20138
PCS_AGD66_AMG_zone_48 = 20248
PCS_AGD66_AMG_zone_49 = 20249
PCS_AGD66_AMG_zone_50 = 20250
PCS_AGD66_AMG_zone_51 = 20251
PCS_AGD66_AMG_zone_52 = 20252
PCS_AGD66_AMG_zone_53 = 20253
PCS_AGD66_AMG_zone_54 = 20254
PCS_AGD66_AMG_zone_55 = 20255
PCS_AGD66_AMG_zone_56 = 20256

..etc..etc..etc...and...etc...

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[Message index]

		Re: create geotiff By: David Fanning on Wed, 26 September 2007 09:47
		Re: create geotiff By: Paul Van Delst[1] on Wed, 26 September 2007 09:33
		Re: create geotiff By: David Fanning on Wed, 26 September 2007 08:06
		Re: create geotiff By: Paul Van Delst[1] on Wed, 26 September 2007 07:51
		Re: create geotiff By: David Fanning on Wed, 26 September 2007 07:42
		Re: create geotiff By: KRDean on Wed, 26 September 2007 07:27
		Re: create geotiff By: David Fanning on Tue, 25 September 2007 11:43

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