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LAND ADMINISTRATION: GIS, SATELLITE IMAGING N.S. SHANKAR. DIGITALGLOBE. BANGALORE ;+919845545661:SHANKARNS@DIGITALGLOBE.COM

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DGPS Point Collection

Aerial Triangulation

Extraction of topographic feature (Mass Points / Break lines)

Generation of Contours

Stereo Compilation

Data Finalization

NLRMP/DILRMP: 1:4000 maps

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DigitalGlobe Satellite Constellation : 30-cm Stereo

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Taj Mahal, Agra, WV03, 30cm

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Churchgate Station, Mumbai, WV03, 30cm

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2/9/2017

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The Geospatial Big Data Platform (“GBDX”) Extract information from imagery and other sources at scale

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To provide enriched information feeds at mission relevant speeds

DigitalGlobe Library

Other Commercial Imagery Sources

Open Source Content

Geospatial Big Data Platform Analysis-

Ready Information

Layers

Access via GBDX Subscription

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Sample Changes Detection using archives online

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ACCURACY : Haryana, Orissa, Konkan,NDVA, NHAI, RITES, Maharashtra, Delhi, RAPDRP, West Bengal

• Control Points has been collected at 4X4 Km grid.

• Few controls points has been used for triangulation.

• Few points has been used as check points for accuracy check.

• One AOI which is approximately of 8K Sq Km was processed as one block.

• The accuracy achieved was

X = 0.22 Mts

Y = 0.26 Mts

Z = 0.46 Mts

• Additional checking was done using stereo visualization.

• Further check was done by identifying few parcels on orthorectified Imagery and measured the distance in all four directions and diagonally by GIS tools and measured the same on the ground which are with the limit of < 5%.

2/9/2017

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3-D Products with DEM , True Ortho Photos

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