Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (13 download)
Book Synopsis Existing Vegetation Map Maintenance Guide by :
Download or read book Existing Vegetation Map Maintenance Guide written by and published by . This book was released on 2008 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing vegetation maps provide much of the information needed for forest planning and analysis, and project implementation and monitoring. Maps are the most convenient and universally understood means to represent the spatial arrangement and relationships among features on the Earths surface (Mosby 1980). Because developing these maps requires a large expenditure of time and money, a maintenance process is needed to keep the maps current and useful. Updates are needed after landscape changes such as wildfires or timber harvests and to correct thematic errors that are inherent in any mapping project. Without revisions, maps can quickly become out of date and inaccurate. The map maintenance process outlined in this report is an interdisciplinary approach that requires both ecological and geospatial knowledge. In summary, the process includes the following steps: 1) locating the landscape changes or thematic errors; 2) defining the type of change or error; 3) determining the correct map label; 4) selecting the appropriate GIS or remote sensing updating technique; and 5) distributing the revised map and associated databases. Any updates must maintain the map integrity and features such as the minimum mapping unit, resolution, classification scheme, and map units. If any of these elements are changed, the process turns into a remapping effort instead of an update. These guidelines were prepared under the sponsorship of the Forest Service Remote Sensing Steering Committee. They are based on the results of demonstration pilot projects conducted within the Bridger-Teton and Humboldt-Toiyabe National Forests. This report does not provide specific technical information but instead outlines the general concepts that shape a map maintenance program. The reader should consult the regional remote sensing coordinator before initiating a program.
