Draw from PLY File

Use the POLYDRAW GX to draw the polygons from a polygon file on the map.

The option is available with the following menus:

  • Database Tools > Window Data > Draw from PLY File

  • Map Tools > Draw from PLY File

  • Geochem Analysis > Classify by Region > Draw Mask Outline in the Geochemistry extension

Draw from PLY File dialog options

Polygon file name (.ply)

The name of the polygon file.

Script Parameter: POLYDRAW.FILE

Map view

Map view in which to draw, select from the list.

Script Parameter: POLYDRAW.VIEW

Clip to view

Determines if polygon should be clipped to current view or not. Default is ‘Yes’.

Script Parameter: POLYDRAW.NOCLIP (0 – Yes, 1 – No)

Draw as polylines

Only draws polylines and do not close open polygons. Default is ‘No’

Script Parameter: POLYDRAW.POLYLINE(1 – Yes, 0 – No)

Draw multiple polygons as single item

Determines if polygon should be clipped to current view or not. Default is ‘Yes’.

Script Parameter: POLYDRAW.POLYMULTI (0 – Yes, 1 – No)

Line thickness (mm)

The polygon outline line thickness in mm.

Script Parameter: POLYDRAW.LINETHICK

Line colour

Select a line colour from the list.

Script Parameter: POLYDRAW.LINECOLO

Fill colour (ignored for polylines)

Select a fill colour from the list.

Script Parameter: POLYDRAW.FILLCOLO

Application Notes

Polygons are ASCII files with default extension .ply. A polygon file contains a list of X,Y coordinates that define one or more polygons. The file may contain any number of polygons, and each polygon may have any number of vertices. The first and last points in each polygon are assumed to connect. If the file will contain more than one polygon, each polygon must start with a line 'poly #' ('p' or 'P' in column 1). Comment lines are indicated by a '/' in column 1.

Clip polygon files may also be generated interactively by using the digitising tools in the Map Tools menu.

Example of a single polygon file:

 Sample single polygon file
/
        
/----------------------------
poly 1
1376027.6061 6178025.9399 
1382846.3129 6178025.9399 
1382846.3129 6182748.8182 
1376027.6061 6182748.8182 
1376027.6061 6178025.9399 
Following is an example of a three polygon file (note the exclusive following the poly 3 entry, this indicates exclusive regions or holes in polygon sets):
/ Sample three polygon file
/---------------------------
poly 1
1375594.6724 6181961.6718 
1378706.3838 6181961.6718 
1378706.3838 6184716.6842 
1375594.6724 6184716.6842 
1375594.6724 6181961.6718 
poly 2
1375757.0225 6178629.4188 
1379896.9516 6178629.4188 
1379896.9516 6181174.5254 
1375757.0225 6181174.5254 
1375757.0225 6178629.4188 
poly 3
exclusive
1380546.3523 6175926.8828 
1384550.9896 6175926.8828 
1384550.9896 6179022.992 
1380546.3523 6179022.992 
1380546.3523 6175926.8828 

See Also: