The main purpose of these files is to automate legend classification using the
same symbols for all similar data themes, but they also serve as documentation
of attributes and range of attribute values of each theme.
These files are stored in the same sub-directory as the
"Look up table for aTheme point data: anAttribute",,,,
"Look up table for aTheme line data: anAttribute",,,,
"Look up table for aTheme polygon data: anAttribute",,,,,,
The first line is common to all these LUT-files of each type and must not be
changed. As seen, the first four columns are equal for all types, while the
remaining column(s) differ, as they define the size and look of the chosen symbol.
The second line is a comment line identifying the data set member and
attribute. The commas ending the line must be there. The next lines in the files will
specify how each attribute value should be displayed. The first column (
The third column ("Symbol#") is the number of the symbol in the ArcView symbol
palette (where 0 is the number of the first symbol in the list). For point
data the symbol# identifies a symbol in the Marker symbol palette, for line data the symbol# identifies a symbol in the Pen symbol palette, while for polygon data the symbol# identifies a symbol in the Fill symbol palette. The symbol# column must not be empty.
The fourth column ("Colour") specifies the name of the colour to be used for
the symbol. This column may be empty (,,), in which case a random colour will be
used. The colour names are similar to UNIX colour name table, and includes 738
colour names defined by their RGB values. Appendix C list the contents of the
AVENUE script specifying the colour names. To get a transparent fill, the
colour must be specified as "Transparent".
The next columns are optional. The fifth column specifies a size property of
the symbol. For point data the fifth column ("Size") specifies the marker size
in pt., while for line data the fifth column ("Width") specifies the line width
in pt. For polygon data the fifth column ("OlWidth") specifies the outline
width in pt., while the sixth ("OlColor") and seventh ("BgColor") columns defines
the outline and background colour respectively. To achieve a polygon fill
without an outline, the outline colour must be specified as "Transparent".
As an example, the following shows the first four and the last lines of the
dnlntype.lut file:
"Value","Label","Symbol#","Color","Width"
"Look up table for DCW DNNET line data: Dnlntype",,,,
1,"Stream, river, channelized river",0,"lightblue",
2,"Inland water body shoreline",0,"lightblue",
...
9,"Tile boundary or null arc",,"Transparent",
The main purpose of these files (and the attribute definition files) is to
automate legend classification using the same symbology for all similar data
themes, but they also serve as documentation of attributes and range of attribute
values of each theme.
Data set member attribute value look-up-files