elizabeth lomani martina corporation. airport background 1. majuro, marshall islands 2. elevation: 2...
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High Resolution DEM Creation for Majuro Airport
Elizabeth Lomani
MarTina Corporation
Airport Background1. Majuro, Marshall Islands2. Elevation: 2 meters3. Max Runway: 2407 x 46 meters4. Accommodate 25 flights per week
International flights Cargo flights Domestic flights
5. Important infrastructures1. Airport2. Water catchment for the island
Important infrastructures
ReservoirPipelines
Airport
Steps to Creating the Airport DEMResults from topographic surveyConvert DXF to GIS formatDigitised spot heightsExport to Access for data integrity checksExport to ErdasDTM creation in Erdas
Convert DXF to GIS format• Too many
files to go through.• Opening
files proved to be tedious and time consuming
Digitising spot heights
Contour lines without elevation values
Extracting elevation values from original file
More than one feature on one file
1 2
3
Result of Digitising
5 people digitised the spot heights
14,000 points digitised
10,00 points - useful
Export to Access for data integrity checks
Null ValuesUnrealistic heightsConversion from
feet to meters
DTM Creation
Surface model was created
Holes in the middle of the airport Negative valuesTypos
2030 Sea level rise inundation model
16cm sea level riseSpatial Analysis
Area loss20% Infrastructure
affected
2055 Sea level rise inundation model
30cm sea level rise
Spatial AnalysisArea loss50%
Infrastructures affected
2090 inundation model
60cm sea level rise
Spatial AnalysisArea lossMore than 90%
Infrastructures affected
Thanks