There are three ways to do this:
1) Use the layer property settings (ini files). The point representing each vehicle or other object on the map should have an attribute field with a unique value. Then use the visual layer property settings to associate a unique symbol to point feature(s) with the matching attribute value. The set-up is saved to the TatukGIS project file. (For more on the visual layer property settings and rendering symbols in particular, refer to the relevent TatukGIS Editor/Viewer help topic, tutorials, and video tutorials.)
2) Set/alter INI files programmatically:
layer.ParamsList.Add;
layer.Params.Query:='age<18';
layer.Params.Area.Color:=clRed;
layer.ParamsList.Add;
layer.Params.Query:='age>=18';
layer.Params.Area.Color:=clGreen;
You can also traverse existing ini sections:
for i:=0 to layer.ParamsList.Count -1 do begin
layer.ParamsList.Selected := i ;
color := layer.Params.Area.Color ;
...
end ;
or
for i:=0 to layer.ParamsList.Count -1 do begin
color := TGIS_ParamsSectionVector(layer.ParamsList[i]).Area.Color ;
...
end ;
3) Alter each shape directly:
myshp1.Area.Color := clGreen ;
myshp2.Area.Color := clRed ;
myshp3.Area.Color := clYellow ;