| Forest is the topic of terrestrial ecosystems, is an essential condition for people to live. Forest resources survey is designed to respond to the needs of forest management, forest management plan, the overall design, forestry division and forest planning. Actually, it is forest resource inventory. How to vividly show a forest of full view, distribution and design of cutting area becomes a challenge to forestry field.The rapid development of computer technology comprehensively promotes the level of forestry informationization. The appearance of digital map breaks the situation in simulation map domination. Digital maps innovation more catalyses the speed of digital forestry development. The way of forestry mapping from the previous hand-drawn to the current computer mapping changes the defect in complex process, difficult to ensure accuracy, low degree of standardization, long cycle, expensive cost and slow updates.This article mainly realizes a new idea that using computer secondary development technology to draw forestry maps. Using AutoCAD ObjectARX application technology platform, C++ language on CASS software to enable them to realize some functions such as padding, notes, property editing, outputting a variety of forest survey results maps which include basic map, forest map, distribution of forest map, professional map, forest cutting area map and so on.This research firstly integrates forestry mapping function into CASS software which not only in forming a terrain map, forming a cadastral map and project surveying is widely used but also creates a new way in foresty field. The ObjectARX technology used in system represents the highest level of AutoCAD technology development. The program which using ObjectARX technology shares same address space with AutoCAD can directly access to the database. So, this makes the forestry digital mapping technology faster, more efficient, more simple and meets the requirements of short cycle, low cost and fast updates, etc. |
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