Final answer:
The City of Plattsburgh uses the NY State Plane Coordinate system because it is more accurate for small-scale mapping within a limited area. The NYS Adirondack Park Agency uses the UTM Zone 18N coordinate system for its GIS database due to its global consistency and recognition.
Step-by-step explanation:
The City of Plattsburgh uses the NY State Plane Coordinate system for their GIS database because it is more accurate for small-scale mapping and measurements within a limited area. The NY State Plane Coordinate system divides New York State into multiple zones, each with its own coordinate system. This allows for more precise calculations and measurements at the local level.
The NYS Adirondack Park Agency uses the UTM Zone 18N coordinate system for their GIS database because it provides a globally consistent and widely recognized reference system. UTM (Universal Transverse Mercator) is based on a cylindrical projection and divides the world into 60 zones, with Zone 18N covering the northeastern part of the United States.