PGDM: Hazard Mapping Standards

Hazard Mapping

Priority hazards for mapping under PGDM

Antigua/Barbuda
  • Wind (hurricane)
  • Drought
  • Storm Surge
  • Ground Shaking
  • Coastal Erosion
  • Inland Erosion
  • Flooding
St. Kitts/Nevis
  • Wind (hurricane)
  • Drought (Nevis only)
  • Storm Surge
  • Ground Shaking
  • Coastal Erosion 
  • Inland Erosion (St. Kitts only)
  • Flooding
  • Volcanic Hazards

Mapping specifications

Grid: British West Indies
Projection: Transverse Mercator
Spheroid: Clarke 1880 (Modified)
Units: Metre
Meridian of Origin: 62 ° W of Greenwich
Latitude of Origin: Equator
Scale factor at Origin: 0.9995
False Coordinates of Origin: 400,000m Easting, Nil Northing

Mapping Terms of Reference

Hazard Type Wind, Storm Surge, Earthquake Hazard, Drought, Flood, Erosion (Coastal and Inland)
Coverage Antigua/Barbuda, St. Kitts/Nevis
Scale of Mapping Drought, Flood, Erosion - 1:25000

Wind, Storm Surge: 200 m grid resolution

Ground Shaking – 0.1 degrees

Deliverables
  1. Hard copy map (original colour)
  2. Data in Arc Info GIS or compatible format
  3. Technical report describing the structure and content of the maps produced, the methodology employed in map preparation, including data collection, analysis and final preparation, map use and limitations, metadata and information sources. Recommendation for future work should also be included.
  4. Non-technical summary of iii above
Information to include on map sheet
  1. To be presented on overlay base map (containing contours, roads, main towns) provided by the project (DCA to prepare)
  2. Title
  3. Scale
  4. Date of map
  5. Map should be zoned (color or gray scale) into 5 areas of relative hazard (very low, low, moderate, high, very high)
  6. Legend with explanatory text; the map legend should explain in qualitative and quantitative terms, the meaning of the relative ranking terms.
  7. Use and limitations of map
  8. USAID and OAS logos
  9. PGDM website
  10. The hazard map itself should be located in the upper three quarters of the map sheet; the map title should be positioned in the top central area of the map, and the map scale on the lower left corner of the upper ¾ of the sheet. Items ii through ix are to be positioned in the lower quarter of the map sheet, with the legend and explanatory text in the left half and items iv, vii – ix in the right half

USAID/OAS Post-Georges Disaster Mitigation: http://www.oas.org/pgdm

Page last updated on 21 Dec 2000