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Large Scale Topographic Mapping in Indonesia Dr. Ade K. Mulyana Aldino Rizaldy Edwin Hendrayana Center for Topographic Mapping and Toponyms Geospatial.

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Presentation on theme: "Large Scale Topographic Mapping in Indonesia Dr. Ade K. Mulyana Aldino Rizaldy Edwin Hendrayana Center for Topographic Mapping and Toponyms Geospatial."— Presentation transcript:

1 Large Scale Topographic Mapping in Indonesia Dr. Ade K. Mulyana Aldino Rizaldy Edwin Hendrayana Center for Topographic Mapping and Toponyms Geospatial Information Agency Indonesia

2 Background Law No.4/2011 on Geospatial Information mandates a.o.: – Transformation from BAKOSURTANAL (National Coordinating Agency for Surveys and Mapping) into BIG (Geospatial Information Agency) – BIG to provide topographic maps as base maps for all thematic maps at small, medium dan large scales – Large scale mapping: 1:10,000 1:5,000 1:2,500 and 1:1,000

3 Land area of Indonesia: 1.9 million km 2 Prioritization: large scale mapping only for the urban area At 1:5.000, # sheets for city area (non-district) is more than 15,000. – Capital of provinces – Other cities in need of Detailed Spatial Planning No.Scale Total # Sheets # Sheets available # Sheets to do 11: , : , : , :1000 2,729,

4 Large Scale Topographic Mapping Projects Loan from JICA (Japan) : 4 cities at 1:10,000 (123 sheets ~2600 km 2 ) Performed by a Japanese company Part of NSDI project (1:50K and 1:10K) National Budget, 2012: 6 cities at 1:10,000 (131 sheets) Performed by 2 Indonesian companies National Budget, 2013: 4 cities at 1:10,000 (131 sheets) 1 city at 1:5,000 (98 sheets) Performed by 3 Indonesian companies

5 2012 1:10.000

6 Makassar

7 Pare

8 Manado, Tomohon, Bitung

9 Gorontalo

10 1: Digital Photogrammetry Project Specification Ground Control Point (GCP): – 20 cm planimetric accuracy and 15 cm vertical accuracy – GCP must be signalized – GCP distribution: in the center and in the corner of the block, as well as along the perimeter. – Independent Check Point (ICP) must be distributed for each map sheet. Photos: – Ground Sampling Distance (GSD) 20 cm – Overlap/sidelap 60%/30% for flat area, and 70%/40% for mountainous area – Camera must be equipped with GNSS/IMU Flight plan: Crossflight is mandatory Aerial Triangulation (AT): – sigma naught of 10 micron and GCP Planimetric RMSE 1 m; Vertical RMSE 0.5 m Topographic map compilation: – Stereoplotting is conducted to produce masspoint, spotheght and breakline – DEM building from masspoint, spotheight and breakline – Contour will be generated from DEM – Feature collection threshold is 5 m

11 1: LIDAR Project Specification Density of point cloud is ≥ 4 points/m 2 Three return per pulse must be recorded include first return and last return ≤ 20 cm of vertical RMSE LIDAR GSD 12 cm for orthoimage LIDAR system must be included with GNSS/IMU Filtering or classification must be performed to post- processing LIDAR raw data to create Digital Surface Model (DSM) and Digital Terrain Model (DTM)

12 2013 1:5.000

13 1:5.000 Project Specification Ground Control Point (GCP): – 20 cm planimetric accuracy and 15 cm vertical accuracy – GCP must be signalized – GCP distribution: in the center and in the corner of the block, as well as along the perimeter. – Independent Check Point (ICP) must be distributed for each map sheet. Photos: – Ground Sampling Distance (GSD) 15 cm – Overlap/sidelap 60%/30% for flat area, and 70%/40% for mountainous area – Camera must be equipped with GNSS/IMU Flight plan: Crossflight is mandatory Aerial Triangulation (AT): – sigma naught of 10 micron and GCP Planimetric RMSE 0.5 m; Vertical RMSE 0.3 m Topographic map compilation: – Stereoplotting is conducted to produce masspoint, spotheght and breakline – DTM building from masspoint, spotheight and breakline – Contour will be generated from DTM – Feature collection threshold is2.5 m

14 GCP Measurement

15 Signalized GCP / ICP

16 Flight Result (Camera Exposure) CROSS LINE

17 Image Result (Makassar, GSD 12 cm)

18 Orthomosaic Image Result (Manado, GSD 12 cm)

19 DSM Result (Manado, 16 cm resolution)

20 Accuracy Test (Manado) 12 cm GSD LIDAR + Medium Format Camera Leica ALS70 + RCD30 32 ICP’s RMSEx = m RMSEy = m RMSEz = m Horizontal Accuracy m Vertical Accuracy m

21 Accuracy Test (Pare Pare) 12 cm GSD Medium Format Camera Leica RCD30 15 ICP’s RMSEx = m RMSEy = m RMSEz = m Horizontal Accuracy m Vertical Accuracy m

22 Accuracy Test (Medan) 25 cm GSD Large Format Camera Vexcel Ultracam-X 18 ICP’s RMSEx = m RMSEy = m RMSEz = m Horizontal Accuracy m Vertical Accuracy m

23 Digital Elevation Models of Makassar Source: Digital Aerial Photographs, June 2012 Processing Method: Digital Photogrammetry Purpose: Topographic Mapping at 1:10,000

24 Topographic Mapping Process Aerial photo’s Airborne IFSAR Airborne LIDAR Data Acquisition DTM (contour lines) Topomap features Stereo Plotting Accuracy Test Toponyms Administrative Boundary Field Survey Topology Seamless- ing Database Cartography Digital Map Gazetteer Products

25

26 Challenges Human resources Standards and Project Specification Data Acquisition – Camera and LIDAR equipment availability – Aircraft availability: Weather (rain and cloud) and terrain condition

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