Design and implementation of drawing function module for CASS in forestry

In order to improve the rapidity and efficiency of forestry mapping, icon and symbol library of forestry was established according to the standard specification of forestry mapping. Furthermore, by making use of AutoCAD secondary development technology ObjectARX and C++ language, the CASS software was developed to integrate with forestry mapping function including zoning, filling, annotation, property editing, query, area measurement, area adjustment, maps finishing, print output as a whole to be a forestry mapping software. The combination of graphics management and visualization in digital forestry mapping to satisfy the requirements of forestry mapping on high speed, activity and concision explore a new way for digital forestry mapping.