EVOLUTION-MANAGER

Edit File: CDED.notes

Field Map
=========

Offset Length Name                    Notes
------ ------ ----                    -----

0    40   Filename                Generated from output filename.

40    60   Producer of Data        Template or blank.

100     9   Filler                  Blank

109    26   SW Geographic Corner    Generated.

135     1   Process Code            Template or blank.

136     1   Filler                  Blank

137     3   Sectional Indicator     Template or blank.

140     4   Origin Code             Template or blank.

144     6   DEM Level Code          Template or blank.
	                              "1" for PRODUCT=CDED50K

150     6   Elevation Pattern       Hardcoded to "1" (regular)

156     6   Horizontal Reference    Hardcoded to "0" (Geographic)
              System

162     6   UTM/SP Zone             Hardcoded to "0".

168   360   Projection Parameters   Each hardcoded to 0.0.

528     6   Horz. Unit of Measure   Hardcoded to "3" (arc seconds)

534     6   Vert. Unit of Measure   Hardcoded to "2" (meters)

540     6   Cov. Polygon Sides      Hardcoded to "4".

546   192   Corner Coordinates      Generated

738    24   Minimum Elevation       Generated

762    24   Maximum Elevation       Generated

786    24   Rotation Angle          Hardcoded to "0".

810     6   Accurancy Code          Hardcoded to "0"

816    36   Spatial Resolution      X/Y generated, Z hardcoded to 1.0.

852    6    Rows of Profiles        Hardcoded to "1".

858    6    Columns of Profiles     Generated (height of dem in pixels)

864   12    Largest/Smallest Primary      Blank
              Contour Intervals and Units

876    4    Data source data        Template or blank.

880    4    Data inspection or      Template or blank.
              revision date

884    1    Inspect. Revision Flag  Template or blank.

885    1    Data Validation Flag    Template or blank.

886    2    Suspect/Void Flag       Generated (0=none,2=void area)

888    2    Vertical Datum          Template or "1" (MSL).

890    2    Horizontal Datum        Template or "4" (NAD83).

892    4    Data edition/version    Template or blank.
              Spec edition/version    "1020" for PRODUCT=CDED50K

896    4    Percent Void            Generated.

900    8    Edge Matching Flags     Template or blank.

908    7    Vertical Datum Shift    Hardcoded to "0.0".

CDED Production Issues
======================

The following fields should be addressed in a template file.

Offset Length Name                    Notes
------ ------ ----                    -----

40    60   Producer of Data

135     1   Process Code            The CDED spec lists options as
                                         "8" = ANUDEM
                                         "9" = FME for LINUX, Build 842
                                         "A" = TopoGrid

140     4   Origin Code             Should be "YT" in Yukon I believe.