Autodesk 15606-011408-9320 User Guide - Page 99

Raster Image Catalog File Format, Working with Raster Images, Online Help Index

Page 99 highlights

Online Help Index raster layers creating Raster Image Catalog File Format Raster image catalog files are ASCII, comma-delimited (CSV) files with the following format: "",,,, "",,,, "",,,, ... "",,,, Note that the names of the raster image files may not contain commas (,), and the quotation marks (") around the raster image file names are optional. The names of the individual raster image files entered in the RIC may be specified using the full absolute path name, the path relative to the RIC file location, or only the file name itself. If only the file name of the raster image is specified, the search will start in the directory where the RIC is located before using the Raster Image Search Path (specified in Autodesk MapGuide Server Admin) to locate the file. All images in a RIC must be of the same color depth (1, 8, 24, or 32 bits); combinations of different color depths are not supported. However, images of different resolutions are supported. For example, you could mix 1- and 2meter resolution data. Also, images in a RIC can be in different formats, such as TIFF, TGA, PNG, and so on. Images are processed in the same order in which they are listed in the RIC. Therefore, if two images overlap each other, the image specified later in the list will cover the image specified earlier in the list. When you create a layer, you can specify a transparent background for bitonal images, so bottom  images can show through the background area of the top image. For detailed information about creating a raster layer, choose Help Contents, click the Index tab, and look up "raster layers, creating." The extents (outer boundary) of each raster image must be specified using the xMin, yMin, xMax, and yMax parameters. These parameters specify the center or middle position of the lower-left and upper-right pixels of the image (as opposed to the corners of the pixel), and they must be specified in the same coordinate system as that used by the map and any other images in the RIC. Autodesk MapGuide Server uses the extent parameters to quickly determine if an image is within the viewing area without having to open the georeference file associated with each raster image. Working with Raster Images | 99

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Working with Raster Images
|
99
Raster Image Catalog File Format
Raster image catalog files are ASCII, comma-delimited (CSV) files with the
following format:
"<Name of the raster image file1>",<xMin>,<yMin>,<xMax>,<yMax>
"<Name of the raster image file2>",<xMin>,<yMin>,<xMax>,<yMax>
"<Name of the raster image file3>",<xMin>,<yMin>,<xMax>,<yMax>
...
"<Name of the raster image file
n
>",<xMin>,<yMin>,<xMax>,<yMax>
Note that the names of the raster image files may not contain commas (,),
and the quotation marks (
) around the raster image file names are optional.
The names of the individual raster image files entered in the RIC may be
specified using the full absolute path name, the path relative to the RIC file
location, or only the file name itself. If only the file name of the raster image
is specified, the search will start in the directory where the RIC is located
before using the Raster Image Search Path (specified in Autodesk MapGuide
Server Admin) to locate the file.
All images in a RIC must be of the same color depth (1, 8, 24, or 32 bits);
combinations of different color depths are not supported. However, images
of different resolutions are supported. For example, you could mix 1- and 2-
meter resolution data. Also, images in a RIC can be in different formats, such
as TIFF, TGA, PNG, and so on.
Images are processed in the same order in which they are listed in the RIC.
Therefore, if two images overlap each other, the image specified later in the
list will cover the image specified earlier in the list. When you create a layer,
you can specify a transparent background for bitonal images, so bottom
images can show through the background area of the top image. For detailed
information about creating a raster layer, choose Help
Contents, click the
Index tab, and look up
raster layers, creating.
The extents (outer boundary) of each raster image must be specified using the
xMin, yMin, xMax, and yMax parameters. These parameters specify the
center or middle position of the lower-left and upper-right pixels of the
image (as opposed to the corners of the pixel), and they must be specified in
the same coordinate system as that used by the map and any other images in
the RIC. Autodesk MapGuide Server uses the extent parameters to quickly
determine if an image is within the viewing area without having to open the
georeference file associated with each raster image.
Online Help Index
raster layers
creating