Revision: 5925
http://sourceforge.net/p/jump-pilot/code/5925
Author: ma15569
Date: 2018-08-24 08:56:28 +0000 (Fri, 24 Aug 2018)
Log Message:
-----------
Private TIFF Tags
Added Paths:
-----------
core/trunk/src/org/libtiff/jai/codec/XTIFFExt.java
Added: core/trunk/src/org/libtiff/jai/codec/XTIFFExt.java
===================================================================
--- core/trunk/src/org/libtiff/jai/codec/XTIFFExt.java
(rev 0)
+++ core/trunk/src/org/libtiff/jai/codec/XTIFFExt.java 2018-08-24 08:56:28 UTC
(rev 5925)
@@ -0,0 +1,189 @@
+package org.libtiff.jai.codec;
+
+public class XTIFFExt extends XTIFF {
+
+ // Private TIFF Tags
+ // (https://www.awaresystems.be/imaging/tiff/tifftags/private.html)
+ // Added
+ // a) to manage nodata and possible Metadata (currently managed by external
+ // xml file
+ // b) to keep name compatibility for geotiff tags and have a description
+
+ /**
+ * Name GDAL_NODATA
+ *
+ * @Type ASCII
+ * @Count N
+ * @Description Used by the GDAL library, contains an ASCII encoded nodata
+ * or background pixel value.
+ *
+ * In the geospatial image processing field especially (and in
+ * other fields) it is common to use a special pixel value to
+ * mark geospatial areas for which no information is
available.
+ * This is often called a "nodata" or "background" value.
+ * Applications often treat these pixels as transparent and
+ * they are often not included in spatial statistics for the
+ * image. Non-geospatial applications might still use the
+ * nodata value to track a special value that should be
treated
+ * as transparent since currently TIFF palettes don't include
+ * an alpha value.
+ *
+ * The GDAL_NODATA tag is intended to keep track of what pixel
+ * value is being used for this background nodata value. It is
+ * ASCII encoded so that if the pixel value 255 was to be
+ * treated as nodata, then the tag would have the value "255".
+ *
+ * If this tag is absent there is assume to be no nodata value
+ * in effect for the image. If the image has more than one
+ * sample it is assumed that all samples have the same nodata
+ * value.
+ *
+ * This tag is currently only supported by the GDAL library.
+ */
+ public static final int GDAL_NODATA = 42113;
+ /**
+ * Name GDAL_METADATA
+ *
+ * @Type ASCII
+ * @Count N
+ * @Description Used by the GDAL library, holds an XML list of name=value
+ * 'metadata' values about the image as a whole, and about
+ * specific samples.
+ *
+ * Contains an XML fragment that looks like this example:
+ *
+ * <GDALMetadata> <Item name="TITLE">BV02021.CA
NASA-FAO</Item>
+ * <Item name="IMAGETYPE">13, ARTEMIS NEWNASA</Item> <Item
+ * name="UNITS" sample="0">Meters (elevation)</Item> <Item
+ * name="OFFSET" sample="0" role="offset">0</Item> <Item
+ * name="SCALE" sample="0" role="scale">0.003</Item>
+ * </GDALMetadata>
+ *
+ * The <Item> names are the name of a metadata keyword, and
the
+ * text contents of the Item are it's value. Normal XML
+ * escaping applies. The GDALMetadata tag may have zero or
more
+ * Item sub-elements. Generally speaking the item names should
+ * be well behaved tokens (alpha-numeric + underscores) though
+ * that isn't strictly enforced. Also, normally the names are
+ * assumed to be unique.
+ *
+ * The "sample" attribute on an Item can be used to indicate a
+ * metadata item that applies only to one sample in a
+ * multi-sample TIFF image. Sample numbering starts from 0.
+ *
+ * The "role" attribute can be used to identify a specific
+ * semantic with a metadata item. GDAL has several specific
+ * pieces of metadata with particular interpretations and
these
+ * are identified with role attributes. At a future date some
+ * of these specific roles may be documented here.
+ *
+ * This is an unregistered tag used only by the GDAL library
+ * and applications built on it to hold Metadata about
+ * geospatial datasets.
+ */
+
+ public static final int GDAL_METADATA = 42112;
+ /**
+ * Name ModelPixelScaleTag
+ *
+ * @Type DOUBLE
+ * @Count 3
+ * @Description Used in interchangeable GeoTIFF files. This tag is
+ * optionally provided for defining exact affine
+ * transformations between raster and model space. Baseline
+ * GeoTIFF files may use this tag or ModelTransformationTag,
+ * but shall never use both within the same TIFF image
+ * directory. This tag may be used to specify the size of
+ * raster pixel spacing in the model space units, when the
+ * raster space can be embedded in the model space coordinate
+ * system without rotation, and consists of the following 3
+ * values:
+ *
+ * ModelPixelScaleTag = (ScaleX, ScaleY, ScaleZ)
+ *
+ * where ScaleX and ScaleY give the horizontal and vertical
+ * spacing of raster pixels. The ScaleZ is primarily used to
+ * map the pixel value of a digital elevation model into the
+ * correct Z-scale, and so for most other purposes this value
+ * should be zero (since most model spaces are 2-D, with Z=0).
+ */
+ public static final int ModelPixelScaleTag = TIFFTAG_GEO_PIXEL_SCALE;
+ /**
+ * Name ModelTiepointTag
+ *
+ * @Type DOUBLE
+ * @Count N = 6*K, with K = number of tiepoints
+ * @Description Originally part of Intergraph's GeoTIFF tags, but now used
+ * in interchangeable GeoTIFF files. This tag is also known as
+ * 'GeoreferenceTag'. This tag stores raster->model tiepoint
+ * pairs in the order ModelTiepointTag = (...,I,J,K, X,Y,Z...)
+ * where (I,J,K) is the point at location (I,J) in raster
space
+ * with pixel-value K, and (X,Y,Z) is a vector in model space.
+ * In most cases the model space is only two-dimensional, in
+ * which case both K and Z should be set to zero; this third
+ * dimension is provided in anticipation of future support for
+ * 3D digital elevation models and vertical coordinate
systems.
+ */
+ public static final int ModelTiepointTag = TIFFTAG_GEO_TIEPOINTS;
+ /**
+ * Name ModelTransformationTag
+ *
+ * @Type DOUBLE
+ * @Count N = 16
+ * @Description Used in interchangeable GeoTIFF files.
+ *
+ * This tag is optionally provided for defining exact affine
+ * transformations between raster and model space. Baseline
+ * GeoTIFF files may use this tag or ModelPixelScaleTag, but
+ * shall never use both within the same TIFF image directory.
+ *
+ * This tag may be used to specify the transformation matrix
+ * between the raster space (and its dependent pixel-value
+ * space) and the (possibly 3D) model space.
+ */
+
+ public static final int ModelTransformationTag = TIFFTAG_GEO_TRANS_MATRIX;
+ /**
+ * Name GeoKeyDirectoryTag
+ *
+ * @Type SHORT
+ * @Count N >= 4
+ * @Description Used in interchangeable GeoTIFF files.
+ *
+ * This tag is also know as 'ProjectionInfoTag' and
+ * 'CoordSystemInfoTag'
+ *
+ * This tag may be used to store the GeoKey Directory, which
+ * defines and references the "GeoKeys".
+ */
+ public static final int GeoKeyDirectoryTag = TIFFTAG_GEO_KEY_DIRECTORY;
+ /**
+ * Name GeoDoubleParamsTag
+ *
+ * @Type DOUBLE
+ * @Count N
+ * @Description Used in interchangeable GeoTIFF files.
+ *
+ * This tag is used to store all of the DOUBLE valued GeoKeys,
+ * referenced by the GeoKeyDirectoryTag. The meaning of any
+ * value of this double array is determined from the
+ * GeoKeyDirectoryTag reference pointing to it. FLOAT values
+ * should first be converted to DOUBLE and stored here.
+ */
+ public static final int GeoDoubleParamsTag = TIFFTAG_GEO_DOUBLE_PARAMS;
+ /**
+ * Name GeoAsciiParamsTag
+ *
+ * @Type ASCII
+ * @Count N
+ * @Description Used in interchangeable GeoTIFF files.
+ *
+ * This tag is used to store all of the ASCII valued GeoKeys,
+ * referenced by the GeoKeyDirectoryTag. Since keys use
offsets
+ * into tags, any special comments may be placed at the
+ * beginning of this tag. For the most part, the only keys
that
+ * are ASCII valued are "Citation" keys, giving documentation
+ * and references for obscure projections, datums, etc.
+ */
+ public static final int GeoAsciiParamsTag = TIFFTAG_GEO_ASCII_PARAMS;
+}
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Property changes on: core/trunk/src/org/libtiff/jai/codec/XTIFFExt.java
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+text/plain
\ No newline at end of property
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