27
Graphics (Chapter 4 in PDF Reference)
This section describes extensions to the PDF specification contained in the
PDF Reference, sixth edition,
version 1.7
and in ISO 32000 (
Document management - Portable document format - PDF 1.7
). The latter
document is the version of the PDF specification that has been ratified by the ISO. These documents differ
as described in
About the ISO Draft of the PDF 1.7 Reference
.
Note:
This guide uses italics to identify information not intended for inclusion in the PDF specification. For
convenience, the phrase
BaseVersion 1.7, Adobe ExtensionLevel 3
is shortened to
ExtensionLevel 3
throughout this document.
4.8 Images
4.8.4 Image Dictionaries
Add new entries,
Measure
and
PtData
, to Table 4.39 in support of geospatial content. See Section
8.8.1
Geospatial Features
on
page 49
.
4.9 Form XObjects
4.9.1 Form Dictionaries
Add new entries,
Measure
and
PtData
, to Table 4.45 in support of geospatial content. See Section
8.8.1
Geospatial Features
on
page 49
.
TABLE 4.39 Additional entries specific to an image dictionary
KEY
TYPE
VALUE
Measure
dictionary
(
Optional; ExtensionLevel 3
) A measure dictionary (see Table 8.110,
page 49
) that specifies the scale and units that apply to the image.
PtData
dictionary
(
Optional; ExtensionLevel 3
) A point data dictionary (see Table 111d,
page 53
) that specifies the extended geospatial data that applies to
the image.
TABLE 4.45 Additional entries specific to a type 1 form dictionary
KEY
TYPE
VALUE
Measure
dictionary
(
Optional; ExtensionLevel 3
) A measure dictionary (see Table 8.110,
page 49
) that specifies the scale and units that apply to the form.
PtData
dictionary
(
Optional; ExtensionLevel 3
) A point data dictionary (see Table 111d,
page 53
) that specifies the extended geospatial data that applies to
the form.
