Adobe Acrobat SDK
Interactive Features (Chapter 8 in PDF Reference)
Adobe® Supplement to the ISO 32000
8.8.1 Geospatial Features 53
Example:
A WKT describing a projected coordinate system
An example of WKT description of a projected coordinate system, formatted for readability. The EPSG code
equivalent to the North_American_Albers_Equal_Area_Conic projected coordinate system is 102008.
PROJCS["North_America_Albers_Equal_Area_Conic",
GEOGCS["GCS_North_American_1983",
DATUM["D_North_American_1983",
SPHEROID["GRS_1980",6378137.0, 298.257222101]
],
PRIMEM["Greenwich",0.0],
UNIT["Degree",0.0174532925199433]
],
PROJECTION["Albers"],
PARAMETER["False_Easting",0.0],
PARAMETER["False_Northing",0.0],
PARAMETER["Central_Meridian",-96.0],
PARAMETER["Standard_Parallel_1",20.0],
PARAMETER["Standard_Parallel_2",60.0],
PARAMETER["Latitude_Of_Origin",40.0],
UNIT["Meter",1.0]
]
Point Data Dictionary
Any 2D object (Viewport, Image XObject, or Form XObject) that contains a measure dictionary (Table
8.110,
page 49
) of subtype
GEO
can optionally include a
PtData
entry. The value of a
PtData
entry is a
point data dictionary
or an array of point data dictionaries of extended data associated with points in the
2D space. Table 8.111d lists the entries of a point data dictionary.
TABLE 8.111d Entries in a point data dictionary
KEY
TYPE
VALUE
Type
name
(
Required; ExtensionLevel 3
) The type of PDF object that this
dictionary describes; shall be
PtData
for a point data dictionary.
Subtype
name
(
Required; ExtensionLevel 3
) Shall be
Cloud
.
