Changes between Initial Version and Version 1 of ossim-chipper

Timestamp:

Jul 24, 2013, 8:59:44 AM (11 years ago)

Author:

dburken

Comment:

--

ossim-chipper

@@ +1 @@
+= ossim-chipper =
+ossim-chipper is a command line application used to generate elevation products from raw dem, dted, and srtm data. This application supports 2 basic functions: hillshade and color-relief. From these 2 operations you can create the following products.
+
+[[Image(dem.jpg)]]
+
+===   ===
+== Color Relief ==
+
+Color Relief is used to generate an RGB or ARGB representation of a dem. Different colors are used to represent elevation bands. Users will provide a template with corresponding colors values. 
+
+{{{
+ossim-chipper --op color-relief --color-table template.kwl --srs EPSG:4326 
+input.src output.jpg
+}}}
+
+Command line without dot.src file with lots of options:
+{{{
+ossim-chipper -t 512 --resample-filter BILINEAR  --op color-relief --color-table color-relief-lut1.kwl --output-radiometry U8 --writer-prop compression_quality=75 --writer-prop create_world_file=1 --writer-prop pixel_type=point --cut-bbox-ll 39.452331542969  -106.75654602051 40.507019042969 -105.43818664551 /data1/elevation/dted/level1/w107/n39.dt1 /data1/elevation/dted/level1/w107/n40.dt1  /data1/elevation/dted/level1/w106/n39.dt1 /data1/elevation/dted/level1/w106/n40.dt1 t1.tif
+}}}
+
+There is a color relief template on:
+
+[http://trac.osgeo.org/ossim/browser/trunk/ossim/etc/templates/ossim-chipper-color-table-template.kwl]
+
+
+===   ===
+== Hillshade ==
+
+Hillshade is used to generate a shaded relief. It requires the following inputs:
+ * Sun Azimuth
+ * Sun Elevation
+ * Vertical Exaggeration
+ * Color (either RGB or Color Table)
+
+Example:
+{{{
+ossim-chipper --op hillshade --azimuth 270 --elevation 45 --exaggeration 10
+--color 222,229,188 --srs EPSG:4326 input.src output.jpg
+}}}
+
+Example with color table:
+{{{
+ossim-chipper --op hillshade --azimuth 270 --elevation 45 --exaggeration 10
+--color-table template.kwl --srs EPSG:4326 input.src output.jpg
+}}}
+
+Example with color table without dot.src file:
+{{{
+ossim-chipper --op color-relief --azimuth 270 --elevation 45 --exaggeration 1.5 --color-table color-relief-lut.kwl --srs EPSG:4326 n37.dt1 t1.tif
+}}}
+
+
+
+===   ===
+== Additional Parameters ==
+ossim-chipper shares many of the parameters used in [wiki:orthoigen] including:
+ * writer-props
+ * resample-type
+ * thumbnail
+ * srs
+
+It accepts a comma delimited list of input files or a .src file. The output file extension is used to determine output format. As with [wiki:orthoigen], users can specify a writer to use with a -w argument.
+
+===   ===
+== SRC File ==
+The src file used by ossim-chipper is nearly identical to the one used by [wiki:orthoigen]. The primary difference between the 2 is the use of the dem keyword to distinguish elevation data from imagery data. Example:
+
+{{{
+image0.file: C:\my_image.ntf
+image0.entry: 2
+image0.ovr: D:\support_dir\images\my_image.ovr
+image0.rgb: 3,2,1
+
+dem0:file E:\N38W123.hgt
+dem0.entry: 0
+dem0.ovr: D:\support_dir\dems\N38W123.ovr
+
+dem1:file Z:\N37W123.hgt
+dem1.entry: 0
+dem1.ovr: D:\support_dir\dems\N37W123.ovr
+}}}