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<br />Geographic Information Systems (GIS) <br />& Mapping Subcommittee <br /> <br />GIS and Mapping Subcommittee <br /> <br />The most recent addition to the CNHMC, the GIS <br />and Mapping Subcommittee was formed in August, <br />1992 to integrate GIS and natural hazard mitigation <br />in Colorado. The Subcommittee evolved from GIS <br />hazard mapping activities involving the Colorado <br />Earthquake Hazards Reduction Program (CEHRP) <br />and the Landslide Mitigation Subcommittee. From <br />these activities, a need for coordination of state, fed- <br />eral, and local GIS activity was soon recognized. The <br />Subcommittee has brought together over twenty <br />members with GIS expertise and involvement from <br />various state and federal agencies, local govern- <br />ments, and the private sector. <br /> <br />Subcommittee Projects <br /> <br />In March, 1992, the Colorado Office of Emergency <br />Management (OEM) applied for, and was granted, a <br />one-time federal grant of $20,970 to utilize GIS in <br />support or future activities of the newly established <br />CEHRP. The CEHRP, in cooperation with the GIS <br />and Mapping Subcommittee, is using the grant to <br />identify earthquake and related hazards in Colorado <br />with GIS at both a statewide and local scale. <br /> <br />Project 1 . Colorado GIS Hazard <br />Mapping Project <br /> <br />The first project involving the CEHRP and the GIS <br />and Mapping Subcommittee is to prepare a hazard <br />map for the entire State of Colorado at a scale of 1" = <br />1,000,000 feet. <br /> <br />The geographic information displayed on the state <br />map includes: <br /> <br />. Cities, towns, and <br />county boundaries <br />. Dam locations (Class I <br />and II) <br />. Earthquake faults <br />. Historic earthquake <br />epicenters <br /> <br />. Population densities <br /> <br />. Landslide areas <br /> <br />. Rivers and streams <br /> <br />The lifeline networks displayed on the map include: <br /> <br />- major highways, rail lines, <br /> <br />- oil and gas transmission lines, and <br /> <br />- high voltage power transmission lines. <br /> <br />The map will be used primarily for public outreach <br />and education efforts to show earthquake and re- <br />lated hazards in the state. It will also be used for <br />vulnerability analyses to aid state and local level <br />emergency planning for earthquakes. <br /> <br />Status <br /> <br />Work on the state hazard map is being completed by <br />CEHRP members using PC ARC/INFO GIS software <br />at Colorado State University. Through the GIS and <br />Mapping Subcommittee, almost all of the necessary <br />data has been acquired, most of it already in digital <br />form. Completion is anticipated in the winter of <br />1993. <br /> <br />Project 2 . County Level GIS <br />Hazard Mapping <br /> <br />The second project is a pilot project involving three <br />Colorado counties particularly susceptible to natural <br />hazards that are experiencing rapid population <br />growth: Eagle, Mesa, and Garfield Counties. The <br />goal of the project is to help these counties incorpo- <br />rate GIS for land use planning and hazard mitiga- <br />tion purposes and then to serve as models for other <br />jurisdictions in Colorado. <br /> <br />The geographic information that will be displayed or <br />plotted on local maps include (at 1:24,000 scale): <br /> <br />. Land use . Population density <br /> <br />. Earthquake faults . Earthquake epicenters <br /> <br />. Police and fire stations . Hospitals (including <br />convalescent hospitals) <br /> <br />. Rockfall areas <br /> <br />. Dam locations (Class I <br />and II) <br /> <br />. Landslide areas <br /> <br />. Radio towers <br /> <br />21 <br />