MIL-STD-2301 Computer Graphics Metafile Cgm Implementation Standard For The National Imagery Transmission Format StandardThis standard establishes the requirements necessary to implement Computer Graphics Metafiles CGM used for the representation of symbol graphics in the National Imagery Transmission Format Standard NITFS.

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s.  TIMES-BOLD

t.  TIMES-BOLD-ITALIC

u.  HELVETICA

v.  HELVETICA-OBLIQUE

w.  HELVETICA-BOLD

x.  HELVETICA-BOLD-OBLIQUE

y.  COURIER

z.  COURIER-BOLD

aa. COURIER-ITALIC

ab. COURIER-BOLD-ITALIC

MIL-STD-2301A

5.2.2.2.13  Text Font Index required for output.  The index of every Text Font Index element shall be less than or equal to (<) the number of fonts specified in the Font List element for any CGM implementation generated for NITFS.  The Font List element is required for each CGM that contains a Text Font Index element.

5.2.2.2.14  Edge widths for output.  The CGM implementation for NITFS shall provide the capability to generate and output edge widths of two, four, or six, and optionally, of 1 through 100 for the Edge Width element.

5.2.2.2.15  Line widths for output.  The CGM implementation for NITFS shall provide the capability to generate and output line widths of two, four, or six, and optionally, of 1 through 100 for the Line Width element.

5.2.2.2.16  Edge types required for output.  The CGM implementation for NITFS shall generate and output edge types of solid (1), dashed (2), dotted (3), dash-dot (4), and dash-dot-dot (5), to the Edge Type element.

5.2.2.2.17  Line types required for output.  The CGM implementation for NITFS shall  generate and output line types of solid (1), dashed (2), dotted (3), dash-dot (4), and dash-dot-dot (5), to the Line Type element.

5.2.2.2.18  Interior styles required for output.  The CGM implementation for NITFS shall generate and output interior styles of solid (1), hatch (3), empty (4), to the Interior Style element.

5.2.2.2.19  Text element requirements for output.  The CGM implementation for NITFS shall generate and output the Text element with text string parameter not to exceed 254 characters.

5.2.2.2.20  Character Height requirements for output.  The CGM implementation for NITFS shall generate and output the Character Height element with a value no less than 6.  There is no constraint on the upper limit value.  (Note: interpret implementations must at least support the range of 6 through 72.)

5.2.2.2.21  Polyline element requirements for output.  The CGM implementation for NITFS shall generate and output the Polyline element with at least two and no more than 4096 vertices.

5.2.2.2.22  Polygon and Polygon Set element requirements for output.  The CGM implementation for

NITFS shall generate and output the Polygon element with at least three vertices and no more than 4096 vertices.

5.2.2.2.23  Generate and output sequential order.  The CGM implementation for NITFS shall generate and output CGM elements in the sequential order intended for interpretation.

5.2.2.2.24  Output Text element.  The CGM implementation for NITFS shall generate and output the Text element using the following attributes.  The following attributes must be stated before the first use of the Text element but need not be restated for subsequent occurrences unless a different attribute value is required.

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