Geospatial Features - Adobe 12020596 Supplement Manual

Supplement to the iso 32000, baseversion: 1.7, extensionlevel: 3
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Adobe® Supplement to the ISO 32000
When the value of the
regions in the two dimensional PDF object space and points or regions with respect to an underlying
model of the earth (or, potentially, other ellipsoid objects).
Add the value of
KEY
Subtype
Between the two paragraphs that follow Table 8.110, insert the following.
When the subtype of a measurement dictionary is
page
50, lists and describes these additional entries in a geospatial measure dictionary.
Add a new section to the end of Section 8.8.

8.8.1 Geospatial Features

PDF is a common delivery mechanism for map and satellite imagery data. In extension level 3, a geospatial
coordinate system is introduced (Table 8.110,
explained in this section, to support geospatially registered content.
Geospatial Measure Dictionary
When the subtype of a measurement dictionary (Table 8.110,
defined through a geospatial measure dictionary.
A geospatial measure dictionary, Table 111a, contains a description of the earth-based coordinate system
associated with the PDF object, and corresponding arrays of points in that coordinate system and the local
object coordinate system. It may contain a bounding polygon (the
region of the PDF object for which the geographic associations are valid. It may also contain a choice of
default units (the
coordinate system (the
system other than that associated with the source data. For example, a map may be created in a state
plane coordinate system based on a 1927 datum, but it is possible to display its latitude and longitude
values in the WGS84 datum corresponding to values reported by a GPS device.
The entries of a geospatial measure dictionary are shown in Table 8.111a.
entry is
Subtype
to the
entry of Table 8.110.
GEO
Subtype
TABLE 8.110 Entries in a measure dictionary
TYPE
VALUE
name
(Optional) A name specifying the type of coordinate system to use
for measuring. Valid values follow:
Default value:
entry) for user displays of positions, distances and areas. An optional display
PDU
entry) allows a document to be authored to display values in a coordinate
DCS
Interactive Features (Chapter 8 in PDF Reference)
, the dictionary defines the relationship between points or
GEO
, for a rectilinear coordinate system
RL
, (ExtensionLevel 3) for a geospatial coordinate system
GEO
RL
, additional entries are defined. Table 8.111a,
GEO
page
49) along with a number of PDF constructs, as
page
8.8.1 Geospatial Features
49) is
, additional entries are
GEO
entry), which defines the
Bounds
49

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