Description:

This data set includes: (1) fine-scale snow and land cover maps from two mountainous study sites in the Western U.S., produced using machine-learning models trained to extract land cover data from WorldView-2 and WorldView-3 stereo panchromatic and multispectral images; (2) binary snow maps derived from the land cover maps; and (3) 30 m and 465 m fractional snow-covered area (fSCA) maps, produced via downsampling of the binary snow maps. The land cover classification maps feature between three and six classes common to mountainous regions and integral for accurate stereo snow depth mapping: illuminated snow, shaded snow, vegetation, exposed surfaces, surface water, and clouds. Also included are Landsat and MODSCAG fSCA map products. The source imagery for these data are the Maxar WorldView-2 and Maxar WorldView-3 Level-1B 8-band multispectral images, orthorectified and converted to top-of-atmosphere reflectance. These Level-1B images are available under the NGA NextView/EnhancedView license.

Links:

• Data link
• Data link
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• undefined
• Metadata link

Temporal Extent:

Start: 2015-05-20T00:00:00.000Z

End: 2019-05-05T23:59:59.999Z

Spatial Extent:

Minimum Bounding Rectangle: 48.269722 -121.179528 48.441717 -120.932614

NSIDC_CPRD Short Name: WV_LCC_SC_FSCA Version ID: 1 Unique ID: C3273595705-NSIDC_CPRD

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Description:

This WorldView-2 image of the east coast of Heard Island was collected on 23 Dec. 2010. (Satellite Image Catalogue id=2262 and 2263) The 0.5 m resolution panchromatic band and 2 m resolution multispectral bands were separately orthorectified and two separate image tiles were mosaiced. The images are the result of a rigorous orthorectification of the panchromatic band and eight multispectral bands of the two WorldView-2 images. The images were orthorectified with the TerraSAR-X DEM acquired in Oct 2009. The digital elevation model used in the orthrectification is described by the metadata record 'A Digital Elevation Model of Heard Island derived from TerraSAR satellite imagery' - Entry ID: heard_dem_terrasar The orthorectification of the two Worldview-2 image tiles was carried out in ENVI 4.8. No GCPs were used for the orthorectification process given the very high absolute accuracy of the RPC positioning of WorldView-2. Previously problems were encountered (significant geometric errors) with orthorectification of IKONOS 2004 imagery with DGPS GCPs collected by Dr Jenny Scott. The current orthorectification is considered more accurate given the high absolute spatial accuracy of WorldView-2 (CE90 = 3.5 m) and the more detailed TerraSAR-X DEM of Heard Island. The resulting image is considered a base image for subsequent geometric processing and co-registration of other images (e.g. IKONOS image acquired in 2004 for change detection). The two tiles were mosaiced along a manually digitised cutline in ENVI. For a more detailed description of this process we refer to the report available for download from the provided URL. Personnel involved with this dataset. Dr Arko Lucieer (principal investigator) Iain Clarke (research assistant: geometric corrections) Desiree Treichler (research assistant: radiometric and atmospheric corrections)

Links:

• Data link
• undefined
• undefined
• Metadata link
• Metadata link
• worldview-2_23dec2010_ortho

Temporal Extent:

Start: 2010-12-23T00:00:00.000Z

End: 2010-12-23T23:59:59.999Z

Spatial Extent:

Minimum Bounding Rectangle: -53.202 73.556 -53.013 73.744

AU_AADC Short Name: worldview-2_23dec2010_ortho Version ID: 1 Unique ID: C1214314141-AU_AADC

Description:

The Australian Antarctic Data Centre (AADC) has WorldView-2 satellite imagery, of the Larsemann Hills, Antarctica, captured 18 January 2011. The panchromatic image was orthorectified using ground control points and the RPC coefficients. Rational Polynomial Coefficients (RPCs) model the ground-to-image relationship as a third-order, rational, ground-to-image polynomial. The orthorectified image file is called WV2_18Jan2011_p_orc. The orthorectification was initially done using 35 ground control points from the Australian Antarctic Data Centre's Survey Control Database. The total RMS error was very high so a subset of 25 of these ground control points was selected based on their attributes and terrestrial images as well as accurate visual selection of corresponding image pixels. The final orthorectification was done using this subset of 25 ground control points. The multispectral image was not orthorectified because the origin (top left) coordinates are different to those of the panchromatic image. The ground control points would need to be re-identified in the multispectral image and the time was not available to do this. The processing was done by Angela Bender of the AADC using IDL/ENVI version 4.8.

Links:

• Data link
• Data link
• Metadata link
• larsemann_worldview_18jan2011

Temporal Extent:

Start: 2011-11-18T00:00:00.000Z

End: 2011-11-18T23:59:59.999Z

Spatial Extent:

Minimum Bounding Rectangle: -69.4886 75.9711 -69.3233 76.4114

AU_AADC Short Name: larsemann_worldview_18jan2011 Version ID: 1 Unique ID: C1214313591-AU_AADC

Description:

Despite being a ubiquitous and abundant component of the Southern Ocean ecosystem, pack-ice seals (crabeater, Ross and leopard seals) are notoriously difficult to census as they are sparsely distributed over large regions of remote pack-ice. Historically, population censuses have been made from ship- or helicopter-based surveys, which are expensive and logistically difficult, and this inevitably leads to data which are limited, in time and space. High resolution images allow us now to accurately census seals e.g. elephant and Weddell seals at unprecedented spatial and temporal scales. Using this technology promises to provide regular estimates of the numbers of pack-ice seals in important regions such as Prydz Bay This study will develop techniques to survey pack-ice seals from high resolution satellite images, including automatic detection functions and a preliminary habitat model based on the characteristics of the ice contained in the images.

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• Data link
• Metadata link
• undefined
• AAS_4328_satellite_seals

Temporal Extent:

Start: 2015-11-01T00:00:00.000Z

End: 2017-01-01T23:59:59.999Z

Spatial Extent:

Minimum Bounding Rectangle: -69.70513 67.76367 -65.10984 81.65039

AU_AADC Short Name: AAS_4328_satellite_seals Version ID: 1 Unique ID: C1367275203-AU_AADC

Description:

The WorldView ESA archive is composed of products acquired by WorldView-1, -2, -3 and -4 satellites and requested by ESA supported projects over their areas of interest around the world Panchromatic, 4-Bands, 8-Bands and SWIR products are part of the offer, with the resolution at Nadir depicted in the table. Band Combination Mission GSD Resolution at Nadir GSD Resolution (20° off nadir) Panchromatic WV-1 50 cm 55 cm WV-2 46 cm 52 cm WV-3 31 cm 34 cm WV-4 31 cm 34 cm 4-Bands WV-2 1.84 m 2.4 m WV-3 1.24 m 1.38 m WV-4 1.24 m 1.38 m 8-Bands WV-2 1.84 m 2.4 m WV-3 1.24 m 1.38 m SWIR WV-3 3.70 m 4.10 m The 4-Bands includes various options such as Multispectral (separate channel for Blue, Green, Red, NIR1), Pan-sharpened (Blue, Green, Red, NIR1), Bundle (separate bands for PAN, Blue, Green, Red, NIR1), Natural Colour (pan-sharpened Blue, Green, Red), Coloured Infrared (pan-sharpened Green, Red, NIR). The 8-Bands being an option from Multispectral (COASTAL, Blue, Green, Yellow, Red, Red EDGE, NIR1, NIR2) and Bundle (PAN, COASTAL, Blue, Green, Yellow, Red, Red EDGE, NIR1, NIR2). The processing levels are: Standard (2A): normalised for topographic relief View Ready Standard: ready for orthorectification (RPB files embedded) View Ready Stereo: collected in-track for stereo viewing and manipulation (not available for SWIR) Map Scale (Ortho) 1:12,000 Orthorectified: additional processing unnecessary Spatial coverage: Check the spatial coverage of the collection on a _$$map$$ https://tpm-ds.eo.esa.int/smcat/WorldView/ available on the Third Party Missions Dissemination Service. The following table summarises the offered product types EO-SIP Product Type Band Combination Processing Level Missions WV6_PAN_2A Panchromatic (PAN) Standard/View Ready Standard WorldView-1 and 4 WV6_PAN_OR Panchromatic (PAN) View Ready Stereo WorldView-1 and 4 WV6_PAN_MP Panchromatic (PAN) Map Scale Ortho WorldView-1 and 4 WV1_PAN__2A Panchromatic (PAN) Standard/View Ready Standard WorldView-2 and 3 WV1_PAN__OR Panchromatic (PAN) View Ready Stereo WorldView-2 and 3 WV1_PAN__MP Panchromatic (PAN) Map Scale Ortho WorldView-2 and 3 WV1_4B__2A 4-Band (4B) Standard/View Ready Standard WorldView-2, 3 and 4 WV1_4B__OR 4-Band (4B) View Ready Stereo WorldView-2, 3 and 4 WV1_4B__MP 4-Band (4B) Map Scale Ortho WorldView-2, 3 and 4 WV1_8B_2A 8-Band (8B) Standard/View Ready Standard WorldView-2 and 3 WV1_8B_OR 8-Band (8B) View Ready Stereo WorldView-2 and 3 WV1_8B_MP 8-Band (8B) Map Scale Ortho WorldView-2 and 3 WV1_S8B__2A SWIR Standard/View Ready Standard WorldView-3 WV1_S8B__MP SWIR Map Scale Ortho WorldView-3 As per ESA policy, very high-resolution imagery of conflict areas cannot be provided.

Links:

• Data link
• Data link
• undefined
• WorldView.ESA.archive

Temporal Extent:

Start: 2009-02-07T00:00:00.000Z

End: 2020-12-01T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

ESA Short Name: WorldView.ESA.archive Version ID: 12.0 Unique ID: C2119689694-ESA