GIS-Assisted Spatial Data Management for Corps of Engineers Real Estate Activities: Spatial Data Conversion Options

摘要

Currently, the U.S. Army Corps of Engineers relies primarily on hard- copy paper maps and documents to manage real estate assets. It is now widely understood that real estate data are fundamentally geospatial and that there is great advantage to managing and maintaining cadastral information in a geographic information system (GIS). In order to provide the data in a geographic format, the existing spatial hard copy and digital data must be converted into an appropriate format. The most common methods to convert existing spatial data to a GIS include using Coordinate Geometry (COGO) with paper maps and survey documents, converting computer-aided drafting drawings; digitizing hard-copy maps; and scanning hardcopy maps and then using heads up digitizing or automated vectorization. These methods are discussed in this report. Four Corps District Offices have provided examples of their spatial data conversion methods.