Northern Guam geospatial information server

Download GIS data

Geographic Information Systems (GIS) is a computer support system composed of software, hardware, data, people, and procedures, connected to each other by a network. It has been a popular and powerful technique for urban planning, environmental modeling and decision making, coastal resource management, hydrological applications, etc.

This page provides access to geospatial data formatted as files suitable for use in GIS applications. To download any of the files listed below, click the link with your preferred extent (north Guam or all of Guam). Open the files on your hard drive using GIS software. If you have no GIS software on your computer, download and install free ArcGIS Explorer first.

Topography:

     Northern Guam limits: north | all
     Physiography: north | all
     10-m contours: north | all
     10-m contours, color: north | all
     50-m contours: north | all
     50-m contours, color: north | all
     Elevation intervals: north | all
     Elevation range, color: north | all
     Elevation range, grey: north | all
     Shaded relief: north | all
     Shaded relief + elevation: north | all
     USGS topographic map: north | all
     Slope aspect: north | all
     Slope, in degrees: north | all
     Slope, in percent: north | all
     Cliffline: north | all
     Cliffline + shaded relief: north | all
     Satellite image: north | all

Geology:

     Detailed geology: north | all
     General geology: north | all
     Simple geology: north | all
     Sandy beaches: north | all
     Reef flats: north | all
     Structural geology: north | all
     Structural, simplified: north | all
     Pago-Adelup fault: north | all
     Geologic map raster: north | all

Climate:

     Rainfall distribution: north | all
     Weather data stations: north | all

Soil:

     Detailed map of soils: north | all
     General map of soils: north | all
     Simple map of soils: north | all

Drainage:

     Rivers: north | all
     Aquifer recharge areas: north | all
     Pervious vs. imprevious surfaces: north | all
     Ponding basins: north | all
     Sinkhole locations: north | all
     Closed depressions, contours: north | all
     Closed depressions, polygons: north | all
     Caves: north | all
     Coastal discharge: north | all
     Perched springs: north | all
     Volcanic basement contours: north | all
     Volcanic basement elevation: north | all
     Volcanic basement shaded relief: north | all
     Basement zero contour: north | all
     Basement drainage basin areas: north | all
     Basement drainage basin divides: north | all
     Basement drainage basin discharge: north | all

Groundwater:

     Basal and parabasal groundwater: north | all
     Production wells: north | all
     Observation wells: north | all
     Bedrock conductivity: north | all
     Water table elevation: north | all
     Caves with water table: north | all
     Chloride content: north | all
     Land surface of the NGLA: north | all
     Subsurface of the NGLA: north | all

Vegetation:

     Detailed 2004 landcover: north | all
     Detailed 2011 landcover: north | all
     General 2011 landcover: north | all
     Bare land: north | all
     Cultivated land: north | all
     Wetlands: north | all

Marine:

     Benthic habitat detailed: north | all
     Bottom cover: north | all
     Bottom structure: north | all
     Bottom structure, simple: north | all
     Offshore bathymetry: north | all

Population:

     Populated areas: north | all
     Municipalities: north | all
     Population density: north | all
     Placenames: north | all
     Protected areas: north | all
     Urban buildup: north | all

Infrastructure:

     Routes and streets: north | all
     Buildings: north | all
     Military areas: north | all