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High Resolution DEM Creation for Majuro Airport

High Resolution DEM Creation for Majuro Airport. Elizabeth Lomani. MarTina Corporation. Airport Background. Majuro, Marshall Islands Elevation: 2 meters Max Runway: 2407 x 46 meters Accommodate 25 flights per week International flights Cargo flights Domestic flights

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High Resolution DEM Creation for Majuro Airport

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  1. High Resolution DEM Creation for Majuro Airport Elizabeth Lomani MarTina Corporation

  2. Airport Background • Majuro, Marshall Islands • Elevation: 2 meters • Max Runway: 2407 x 46 meters • Accommodate 25 flights per week • International flights • Cargo flights • Domestic flights • Important infrastructures • Airport • Water catchment for the island

  3. Important infrastructures Pipelines Reservoir Airport

  4. Steps to Creating the Airport DEM • Results from topographic survey • Convert DXF to GIS format • Digitised spot heights • Export to Access for data integrity checks • Export to Erdas • DTM creation in Erdas

  5. Convert DXF to GIS format • Too many files to go through. • Opening files proved to be tedious and time consuming

  6. Digitising spot heights • Contour lines without elevation values • Extracting elevation values from original file • More than one feature on one file 1 2 3

  7. Result of Digitising • 5 people digitised the spot heights • 14,000 points digitised • 10,00 points - useful

  8. Export to Access for data integrity checks • Null Values • Unrealistic heights • Conversion from feet to meters

  9. DTM Creation • Surface model was created • Holes in the middle of the airport • Negative values • Typos

  10. 2030 Sea level rise inundation model • 16cm sea level rise • Spatial Analysis • Area loss • 20% Infrastructure affected

  11. 2055 Sea level rise inundation model • 30cm sea level rise • Spatial Analysis • Area loss • 50% Infrastructures affected

  12. 2090 inundation model • 60cm sea level rise • Spatial Analysis • Area loss • More than 90% Infrastructures affected

  13. Thanks

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