Opened 19 years ago

Last modified 18 years ago

#955 closed defect (invalid)

Reading US state plane projection definition from a TIFF file fails to result in a properly formed WKT string

Reported by: varaev@… Owned by: warmerdam
Priority: high Milestone:
Component: default Version: unspecified
Severity: major Keywords:
Cc:

Description 

Hello Frank,
We are trying to read a US state Plane, NAD 1927, US Survey Feet projection 
from a TIFF file. The projection is valid and can be successfully read using 
other tiff readers. When we are trying to retreive the information using 
pDataset->GetProjectionRef() call, the following string is returned:

PROJCS["unnamed",GEOGCS["NAD27",DATUM["North_American_Datum_1927",SPHEROID
["Clarke 1866",6378206.4,294.9786982139006,AUTHORITY["EPSG","7008"]],AUTHORITY
["EPSG","6267"]],PRIMEM["Greenwich",0],UNIT
["degree",0.0174532925199433],AUTHORITY["EPSG","4267"]],UNIT
["unknown",1],AUTHORITY["EPSG","26771"]]

which does not have sufficient parameters to correctly describe the coordinate 
system.
The example file can be downloaded from:
http://www.avenza.com/Safe/SP27GTIF.TIF
Thanks in advance!

Attachments (1)

SP27GTIF.TIF​ (635.2 KB ) - added by varaev@… 19 years ago.
File with the discussed projection

Download all attachments as: .zip

Change History (2)

by varaev@…, 19 years ago

Attachment: SP27GTIF.TIF​ added

File with the discussed projection

comment:1 by varaev@…, 18 years ago 

See #956 for more details
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