Almaty city, Kazakhstan, 2014 (derived from SPOT stereo imagery)

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Dataset Information

This dataset is a pointcloud over Almaty city, Kazakhstan, derived from SPOT6 optical panchromatic imagery acquired in 2014. The pointcloud was produced using ERDAS imagine (2020), and has been co-registered to TanDEM-X following the geolocation procedure of Nuth et al 2011, which shifted this pointcloud by 2.09/2.38/1.86 metres in the x/y/z directions respectively. A complete description of the generation of this dataset, the images that were used to construct the pointcloud and how the co-registration was performed can be found in the associated publication. Please cite this publication if you use this dataset: Amey R, Elliott J, Hussain E, Walker R, Pagani M, Silva V, Abdrakhmatov K, Watson C. 2021. Significant Seismic Risk Potential from Buried Faults Beneath Almaty City, Kazakhstan, revealed from high-resolution satellite DEMs. Earth and Space Science, 10.1029/2021EA001664 This work has been supported by the the Royal Society GCRF Challenge grant (CHG\R1\170038) and the NERC Innovation award (grant number NE/S013911/1). JRE is supported by a Royal Society University Research fellowship (UF150282), CSW is funded by COMET and the GCRF Urban Disaster Risk Hub (NE/S009000/1), RTW is supported through the NATO Science for Peace and Security Program (Multi-year project G5690).

opentopoID: OTDS.022021.32643.2
DOI: https://doi.org/10.5069/G9MS3QZT
Platform: Structure from Motion / Photogrammetry
Data Format: Point Cloud
Dataset Acknowledgement: The SPOT imagery was purchased through the NERC/ESRC Earthquakes without Frontiers (EwF) consortium (grant number NE/J02001X/1).
Dataset Citation: Amey, R., Watson, C.S., Elliott, J., Walker, R. (2021). Almaty city, Kazakhstan, 2014 (derived from SPOT stereo imagery). Distributed by OpenTopography. https://doi.org/10.5069/G9MS3QZT. Accessed: 2024-10-11
Survey Date: 10/04/2014
Survey Area: 1,619.14 km2
Publication Date: 02/04/2021
Number of lidar returns: 323,291,400 pts
Point Density: 0.2 pts/m2
Coordinates System:
Horizontal: WGS 84 / UTM zone 43N [EPSG: 32643]

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Spatial Extent

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    Point Cloud
  File Name Size Points Area (m2) Density  
1     SPOT_Pointcloud_Almaty_City_Kazakhstan_adj_utm.laz     1.73 GB     323,291,400     1,619,143,965     0.2         File Metadata    
SpatialReference: 
COMPD_CS["unknown",PROJCS["WGS 84 / UTM zone 43N",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","32643"]],VERT_CS["unknown",VERT_DATUM["unknown",2005],UNIT["metre",1.0,AUTHORITY["EPSG","9001"]],AXIS["Up",UP]]]

Lat/Lon/Elevation Boundary:
North-East (lat,lon,elev): [43.46285865, 77.16948337, 1943.15]
South-West (lat,lon,elev): [43.09542199, 76.52398065, 546.42]

Coordinates Boundary:
North-East (X,Y): 675530.05, 4813357.79]
South-West (X,Y): 624005.2, 4773669.1]

Classifications:
Class 0 (Created, never classified)322,820,030
Class 7 (Low Point (noise))471,370
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