tiff2geotiff - Insert georeferencing and dates into a tiff file
tiff2geotiff [options] inputFile outputFile
tiff2geotiff reads a tiff file and converts it to a geotiff (georeferenced tiff) file. tiff2geotiff can insert geo-referencing as well as date/time stamps into the input file. The geo-referencing and date information can be specified for a single image, or for a sequence of images in a multi-directory tiff file.
tiff2geotiff is modified from the geo-tiff application geotifcp, and it supports many options of that program. Type ``tiff2geotiff -h'' to see all the available command-line options. Below are listed all the options needed for doing the tiff to geotiff conversion needed by VAPOR.
Date/Time llx lly urx ury pllx plly purx pury Where:
is a WRF-style date/time stamp in the form yyyy-mm-dd_hh:mm:ss
llx lly urx ury
are the longitude (x) and latitude (y) of the lower-left and upper-right corners of the plot area in the image. This supports georeferencing of images that consist of a plot area surrounded by additional annotation, enabling the latitude and longitude of the plot area to be specified.
pllx plly purx pury
are the relative positions of the plot area corners in the full page, and are values between 0.0 and 1.0 . The georeferencing is such that the plot area will fit exactly at the specified latitude and longitude; however the image will extend further than the plot area if pllx, plly, purx, and pury are not 0.0, 0.0, 1.0, and 1.0 respectively.
none will result in no compression in the output file lzw will result in Lempel-Ziv & Welch encoding
tiff2geotiff -4 "+proj=latlong +ellps=sphere" -n "0 -60 90 -30" infile.tif outfile.gtif
will produce an output geotiff file outfile.gtif that will have the same images as infile.tif, but will in addition be geo-referenced to use a long/lat map projection, and will map the images to the rectangle with lon/lat corners at (0,-60) and (90,-30).
tiff2geotiff -4 "+proj=lcc +lon_0=-30 +lat_1=40 +lat2=60 +ellps=sphere" -m datetimecoordfile.txt infile.tif outfile.gtif
will produce an output geotiff file outfile.gtif that will contain the same image or images as infile.tif, but will in addition be geo-referenced to use a Lambert conformal conic map projection. The Lambert projection will be centered at longitude -30, with the projection being true at latitudes 40 and 60. The resulting geotiff image will have date/time stamps and lon/lat extents as specified in the file datetimecoordfile.txt. The file datetimecoordfile.txt must have one line for each image in the tiff file, and each line must consist of a date/time stamp followed by 8 floating point values as in the following:
2009-07-21_13:30:00 -100 30 -50 50 0.1 0.1 0.9 0.9
In the above line the first value is a date/time stamp. The next four values indicate that the longitude of the plot area of the image goes from -100 to -50 and the latitude goes from 30 to 50. The last four values indicate that the actual image is larger than the plot area, with the plot area going from 10% inside the lower-left corner of the image to 10% inside the upper-right corner.
The PROJ4 wiki http://trac.osgeo.org/proj/wiki
Last updated on Date: 2009/07/22 15:56:16