U.S. Department of the InteriorU.S. Geological Survey

Afghanistan Natural Resource Assessment and Reconstruction Project

Geospatial Infrastructure Development: Task 7 - Digital Elevation Modeling

by Pete Chirico

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: OBJECTIVE

Develop publicly releasable digital elevation models (DEMs) at multiple resolutions from multiple sources to support USGS, USAID, and Afghan Ministries Reconstruction Projects

3D Perspective view of Panjshir valley developed from SRTM DEM and ASTER imagery

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

90m SRTM

30m SRTM

5m DEM

DIGITAL ELEVATION MODELING TASK: APPLICATION EXAMPLES

Applications for which absolute* (not relative) DEMs are important:

Medium horizontal resolution: 90m -30m Geologic Mapping and Interpretation Satellite Imagery Terrain Correction

High horizontal resolution: 30m – 5m Hydrological Applications Geohazard Modeling

Very-high horizontal resolution: 5m - 1m Infrastructure Site Selection and Engineering Urban Applications

* absolute DEMs are tied to a vertical datum on the ground

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: FUNDING and STAFFING

Budget

First 6 Months: Gross Budget: $300,000Net Budget after Assessment: $196,000

Proposed Second 6 Months: Gross Budget: $350,000Net Budget after Assessment: $228,650

Staffing:

½ FTE Pete Chirico (GD EESP Team – Reston)

½ FTE Contractor (GD EESP Team – Reston)

½ FTE Kim Angeli (NMD Advanced Systems Center – Reston)

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: FY05 GOALS

SRTM DEMCovering all of Afghanistan (no gaps)85m horizontal resolution

ASTER DEMsRegional Areas of Interest -approximately 38 ASTER Scenes30m horizontal resolution

High Resolution DEMs from Stereo –Ikonos ImageryRegional Areas of Interest – approximately 5 Areas3-5m horizontal resolution

Very-High Resolution DEM from NTM dataKabulPossibly one other area

Geo-rectified Russian Topographic Maps1:200,000 Scale1:50,000 Scale

Topographic effects on communication tower frequency range

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: FY05 PROGRESS

SRTM DEM-Preliminary Official Use Only “gap-filled” ( with level 1 DTED data) DEM completed and delivered to EDC and Flagstaff -Continuing to produce publicly releasable elevation data to fill gaps

ASTER DEMs-Regional Areas of Interest Identified -approximately 38 Level 1-A ASTER Scenes requested from EDC

High Resolution DEMs from Stereo –Ikonos Imagery- No areas identified - yet

Very-High Resolution DEM from NTM data-DIR written and Data requested for Kabul and Pol-i-Khomri study areas

Geo-rectified Russian Topographic Maps1:200,000 Scale -Scanned, Cropped, and Geo-rectified to Landsat Mosiac – supplied to EDC1:50,000 Scale – Procured cropped and geo-rectified maps from Government source and supplied to EDC (1-CD of data missing –am working on correcting that)

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: SRTM DEM

Preliminary “Gap-Filled” SRTM DEM

85m horizontal resolution

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: Gap Filling SRTM

White voids are gaps in SRTM Data.

Red areas show Russian 1:200,000 Maps for which contours have been digitized to fill SRTM data gaps.

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: Prelim ASTER DEM Areas

Brown circles represent approximate ASTER Scene coverage.

Red and orange boxes show identified priority areas

Afghan Reconstruction Project Meeting: Flagstaff 10/20/04

DIGITAL ELEVATION MODELING TASK: FY05 PRODUCTS

3 Month Deliverables

-Digital Collection of Geo-rectified Russian 1:200,000 scale map sheets-Digital Collection of Geo-rectified Russian 1:50,000 scale map sheets

6 Month Deliverables

- Publicly releasable SRTM DEM segmented into 1:250,000 scale sheet series- ASTER DEMs of selected regions (Kabul, Mazar, Jalalabad, Pol-i-Khomri, and Panjshir)

12 Month Deliverables

- ASTER DEMs of selected regions (Kandahar, Herat, others?)-1 or 2 High Resolution DEMs from Stereo –Ikonos Imagery- Very-High Resolution DEM of Kabul