Opened 15 years ago

Closed 15 years ago

#4 closed enhancement (fixed)

[PATCH] Optimizations to avoid opening CSV files in geo_normalize.c

Reported by: rouault Owned by: warmerdam
Priority: normal Milestone:
Component: libgeotiff Version:
Keywords: Cc:

Description

The attached patch contains several optimizations to avoid opening CSV files in geo_normalize.c for the already hard-coded ellipsoids, datums, units, prime meridian by moving the hard-code cases before the opening of the CSV file.

I've also added a new hard-coded case in GTIFGetPCSInfo() and GTIFGetProjTRFInfo() for UTM projections.

With the patch, gdalinfo on a UTM/WGS84 GeoTIFF doesn't access any CSV file. On my PC, GDAL'Opening that file 1000 times takes now 2.5s versus 11s without it.

Attachments (1)

geo_normalize_ticket4.patch​ (19.3 KB ) - added by rouault 15 years ago.

Download all attachments as: .zip

Change History (2)

by rouault, 15 years ago

Attachment: geo_normalize_ticket4.patch​ added

comment:1 by warmerdam, 15 years ago

Resolution: → fixed
Status: new → closed

Patch applied in libgeotiff trunk (r1503).

Note: See TracTickets for help on using tickets.