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orthoigen
orthoigen is a command line application used to orthorectify, mosaic, and convert raster data between different formats. It provides a number of operations including subsetting, resampling, histogram matching, and reprojection of data. orthoigen is built on top of igen but it doesn't require a keyword list.
Usage
ossim-orthoigen [options] <input_file1> <input_file2> ... <output_file>
Options
--annotate annotation keyword list
--chain-template Specify an external file that contains
chain information
--clip-to-valid-rect <true|false> When true, any requested cut rect is
clipped by the valid image bounding
rect to minimize null border pixels.
If false, the output will correspond
to the cut rect as close as possible
given the product projection. This
option overrides the ossim_preferences
setting. If no cut options are
supplied, this option is ignored.
--combiner-template Specify an external file that contains
combiner information
--combiner-type Specify what mosaic to use,
ossimImageMosiac or ossimFeatherMosaic
or osimBlendMosaic ... etc
--cut-bbox-en Specify the min easting, min northing,
max easting, max northing
--cut-bbox-ll Specify the min lat and min lon and
max lat and maxlon <minLat> <minLon>
<maxLat> <maxLon>
--cut-center-ll Specify the center cut in lat lon
space. Takes two argument <lat> <lon>
--cut-pixel-width-height Specify cut box's width and height in
pixels
--cut-radius-meters Specify the cut distance in meters. A
bounding box for the cut will be
produced
--disable-elev Will disable the elevation
--disable-notify Takes an argument. Arguments are ALL,
WARN, NOTICE, INFO, FATAL, DEBUG. If
you want multiple disables then just
do multiple --disable-notify on the
command line. All argument are case
insensitive. Default is all are
enabled.
--disable-plugin Will disable the plugin loader
--enable-entry-decoding A filename can be separated by a | and
a number (NO space).
Example: a.toc|0 will do entry 0 of
a.toc file and on unix you might want
to use a \ since
the separator is a pipe sign. Example:
./a.toc\|0 will do entry 0 of a.toc.
--geo Defaults to a geographic image chain
with GSD = to the input. Origin of
latitude ison the equator.
--geo-scaled Takes a latitude as an argument for
purpose of scaling. Specifies that no
spec file was defined. Defaults to a
scaled geographic image chain with GSD
= to the input.
--hist-auto-minmax uses the automatic search for the best
min and max clip values. Incompatible
with other histogram options.
--hist-match Takes one image filename argument for
target histogram to match.
Incompatible with other histogram
options.
--hist-std-stretch Specify histogram stretch as a
standard deviation from the mean as
<int>, where <int> is 1, 2, or 3.
Incompatible with other histogram
options.
--hist-stretch Specify in normalized percent the low
clip and then the high clip value as
<low.dd> <hi.dd>. Incompatible with
other histogram options.
--input-proj Makes the view equal to the input. If
more than one file then the first is
taken
--mask Specify the ESRI shape file with
polygons to clip the image
--meters Specifies an override for the meters
per pixel. Takes a single value
applied equally to x and y directions.
--meters-xy Specifies an override for the
meters-per-pixel. Takes two values <x>
<y>
--ossim-logfile takes a logfile as an argument. All
output messages are redirected to the
specified log file. By default there
is no log file and all messages are
enabled.
--resample-type Specify what resampler to use, nearest
neighbor, bilinear, cubic
--scale-to-8-bit Scales output to eight bits if not
already.
--slave-buffers number of slave tile buffers for mpi
processing (default = 2)
--srs specify an output reference
frame/projection. Example: --srs
EPSG:4326
--stdout Output the image to standard out.
This will return an error if writer
does not support writing to standard
out. Callers should combine this with
the --ossim-logfile option to ensure
output image stream does not get
corrupted. You must still pass an
output file so the writer type can be
determined like "dummy.png".
--supplementary-directory or --support Specify the supplementary directory
path where overviews, histograms and
external geometries are located
--tiling-template Specify an external file that contains
tiling information
--utm Defaults to a utm image chain with GSD
= to the input
--view-template Specify an external file that contains
view information
--wkt specify an output reference
frame/projection that is in a wkt
format. Must have the
ossimgdal_plugin compiled
--writer-prop Passes a name=value pair to the writer
for setting it's property. Any number
of these can appear on the line.
--writer-template Specify an external file that contains
tiling information
-K specify individual keywords to add to
the preferences keyword list:
name=value
-P specify a preference file to load
-T specify the classes to trace, ex:
ossimInit|ossimImage.*
will trace ossimInit and all
ossimImage classes
-V or --version Display version information.
-h or --help Display this information
-t or --thumbnail thumbnail size
-w or --writer Specifies the output writer. Default
uses output file extension to
determine writer.
Input Files
For orthoigen you must at a minimum specify an input and an output file. Example:
ossim-orthoigen C:\input.tif D:\output.jpg
Users can specify multiple input files like this:
ossim-orthoigen C:\input.tif C:\input2.tif C:\input3.tif D:\output.jpg
Alternatively, you can pass in a text file with a ".src" extension with a list of file paths separated by a newline. Example:
ossim-orthoigen image.src output.ntf
The corresponding image.src file would be as simple as this:
image0.file: C:\input1.tif image1.file: C:\input2.tif image2.file: C:\input3.tif
Output Format
By default, the output writer type is determined by the extension of the output file. You can specify a specific writer to use via the -w argument. You may also pass in writer specific parameters via the --writer-prop argument. Example:
ossim-orthoigen -w ossim_kakadu_jp2 --writer-prop threads=4 --writer-prop compression_quality=visually_lossless --srs EPSG:4326 N10-E024.tif N10-E024.jp2
Normally orthoigen outputs a physical file but there is a way to redirect the output to the standard output stream. This is particularly useful if you want to create a composite application like a web map server. Currently the output writer is selected from the output file's extension so you must supply a dummy arg. Example:
ossim-orthoigen --stdout input.ntf dummy.png
It is recommended that you use the log file option to avoid corrupting the image stream from any program output (see --ossim-logfile).
Output Projection
orthoigen provides users several options for defining the output projection. The options are summarized below. If none of these options are used, orthoigen will default to the projection of the input file. If multiple input files are supplied, orthoigen will use the projection of the first image in the image chain.
- srs: Allows users to specify a PCS or EPSG code for the output image. For example, to set the output projection to NAD83/UTM zone 12N, specify the following:
orthoigen --srs EPSG:26912 <input files> <output>
- geo: Sets the output projection to WGS84. This is identical to "--srs EPSG:4326". Example:
orthoigen --geo <input files> <output>
- wkt: Sets the output projection using well known text (wkt). Example:
orthoigen --wkt GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]] <input files> <output>
- Other methods:
orthoigen --utm <input files> <output> orthoigen --geo-scaled <latitude> <input files> <output> orthoigen --input-proj <input files> <output> orthoigen --view-template view_template/utm_8.kwl <input files> <output>
Histogram Operations
There are 4 different histogram operations available to create an output image. The options are mutually exclusive.
- hist-auto-minmax uses the automatic search for the best min and max clip values.
- hist-match Takes one image filename argument for target histogram to match.
- hist-std-stretch Specify histogram stretch as a standard deviation from the mean as <int>, where <int> is 1, 2, or 3.
- hist-stretch Specify in normalized percent the low clip and then the high clip value as <low.dd> <hi.dd>.
Tiling Template
For now we have to enable a view when tiling
orthoigen --utm --tiling-template <template> <input files> <output>
Examples
- ossim-orthoigen --geo -t 512 <sourceFile> <sourceFile_tn>
creates an image in geographic projection that is at most 512 pixels on a side (output is tif) - used for thumbnail generation.
- ossim-orthoigen --geo -t 512 --enable-entry-decoding <sourceFile>|<entryNumber> <sourceFile_tn>
same as above but used to make a thumbnail for a specific entry in an RPF set.
- ossim-orthoigen <sourceFile>|<band order> <outputFile>
creates an image using the specified band order - e.g entering 2,4,6 will create an image using bands 2 4 & 6.
- ossim-orthoigen --writer-prop FORMAT=<format> <sourceFile> <outputFile.kml or kmz>
creates a super overlay used by Google Earth.
If no format is specified the default is JPG. Otherwise user can specify "PNG".
keys off file extension - kml or kmz.
- ossim-orthoigen <srcFile> <outputFile>
creates a product using the passed in src file.
- ossim-orthoigen --srs <<outputFrame/Projection> <sourceFile> <outputFile>
creates a product that specifies an output reference frame/projection (e.g. "--srs EPSG:4326")
- ossim-orthoigen.exe --cut-bbox-ll <minLat> <minLon> <maxLat> <maxLon> --enable-entry-decoding <"sourceFile|0|1,2,3"> <outputFile>
creates a product from image0 that uses bands 1, 2, and 3. Also specifies the bounding box coordinates of the source AOI
- ossim-orthoigen --hist-std-stretch <standardDeviation> <sourceFile> <outputFile>
perform a linear contrast stretch using a standard deviation (1, 2, or 3 std deviations).
- orthoigen /data/sanfran_ccf/foo.ccf /data/sanfran_map/sanfran_map.tif output/blend.jpg --combiner-type ossimBlendMosaic -t 512 --utm BLEND thumbnail
- orthoigen --chain-template chain_templates/landsat_projected_321.kwl --tiling-template tiling_templates/1024x1024.kwl --thumbnail 2048 --utm /data/p44r34/l71044034_03420000725_hrf.fst output/ 1024x1024 tiling
- orthoigen --geo --tiling-template tiling_templates/orthoigen_srtm_3arc.kwl /data/ele1/DTED3arc/w100/n40.dt1 output/ SRTM 90 meter tiling
- orthoigen --view-template view_template/utm_8.kwl /data/sanfran_ccf/foo.ccf output/utm8.jpg --thumbnail 1024
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