Opened 16 years ago

Closed 16 years ago

#2225 closed defect (fixed)

HDF4: Georeferencing from NRL Projected Products

Reported by: warmerdam Owned by: warmerdam
Priority: high Milestone: 1.5.1
Component: GDAL_Raster Version: unspecified
Severity: normal Keywords: HDF4
Cc: malaret@…

Description

Some NRL (Naval Research Laboratory) products are projected, bug GDAL does not read the product specific georeferencing information.

eg. 

  mapProjectionSystem=NRL(USGS)
  mapProjection=GreatLakes250
  mapUpperLeft=44.33, -84
  mapUpperRight=44.33, -80.9502444183969
  mapLowerLeft=41.2386810530222, -83.9025410591084
  mapLowerRight=41.2386810530222, -81.0013984519859

Actually means that the GCTP parameters for the projection are in an SDS named GreatLakes250. Some additinonal info is available at:

​http://www7333.nrlssc.navy.mil/docs/aps_v3.4/user/aps/ch07s02.html

Change History (1)

comment:1 by warmerdam, 16 years ago

Resolution: → fixed
Status: new → closed

The contents of the GCTP parameter block were a bit ambiguous (29 values in the block) so PaulM from NRL clarified that these are: 

The first value is a version # (the 1).
The second value is USGS projection system number
The third value is the zone
The fourth value is the spheroid number (12 = WGS84)
Values 5th to 19th are the 15 USGS projection parameters.

The support for handling this has been incorporated into the existing CaptureNRLGeoTransform() function in trunk (r13779) and in 1.5 branch (r13780).

Note: See TracTickets for help on using tickets.