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