ALOS World 3D - 30m (AW3D30) is a global digital surface
model (DSM) dataset with a horizontal resolution of approximately
30 meters (1 arcsec mesh). The dataset is based on the DSM dataset
(5-meter mesh version) of the World 3D Topographic Data.
More details are available in the dataset documentation.
Version 2.2, released in April 2019 is an improved version of the
northern region over 60 degrees north. Along with the complement of no-data or
low-quality area, updating of coastline was also performed.
The AW3D DSM elevation is calculated by an image matching process
that uses a stereo pair of optical images. Clouds, snow, and ice are
automatically identified during processing and applied the
mask information. However, mismatched points sometimes
remain especially surrounding (or at the edges of) clouds, snow,
and ice areas, which cause some height errors in the final DSM.
Here are some example areas with data values outside of valid elevation
range. Impossibly low negative values are concentrated in Antarctica around
(-63.77, -61.660), (-77.22, -150.27), and (-73.29, 168.14); in Indonesia
around (-5.36, 134.55); in Brazil around (-1.667113844, -50.6269684);
and in Peru around (-10.45048137, -75.39459876) with approximate values of
-1013, -998, -635, and -610 respectively. Impossibly high
positive values are found in several locations in the Arctic around
(79.83, -77.67) and (69.54, -75.42); in Fiji around (-16.58, 179.44)
and (-18.96, 178.39); and in Nepal around (28.50, 84.56) with
approximate values of 15369, 15213, and 10900 respectively.
Bands
Pixel Size 30 meters
Bands
Name
Min
Max
Pixel Size
Description
AVE_DSM
-1054*
15355*
meters
Height above sea level. Signed 16 bits (Little endian) raster data.
Elevation (in meter) converted from the ellipsoidal height based on ITRF97
and GRS80, using EGM96†1 geoid model.
AVE_STK
0*
54*
meters
Stacking number of the scene unit DSM used in producing
DSM. The band is derived by resampling the stacking number for
5m resolution DSM to 30m resolution.
AVE_MSK
meters
8-bit mask for the ave band.
Bitmask for AVE_MSK
Bits 0-7: Generated from resampled DSM.
0: Valid
1: Cloud and snow mask (invalid).
2: Land water and low correlation mask (valid).
3: Sea mask (valid).
4: Void filled with GSI DTM (valid).
8: Void filled with Shuttle Radar Topography Mission
SRTM-1 Version 3 (valid).
12: Void filled with PRISM DSM (valid).
24: Void filled with ASTER GDEM v2 (valid).
28: Void filled with ArcticDEM v2 (valid).
252: Void filled with applied IDW method (gdal_fillnodata) (valid)
T. Tadono, H. Ishida, F. Oda, S. Naito, K. Minakawa, H. Iwamoto
Precise Global DEM Generation By ALOS PRISM, ISPRS Annals of
the Photogrammetry, Remote Sensing and Spatial Information Sciences,
Vol.II-4, pp.71-76, 2014. PDF file
J. Takaku, T. Tadono, K. Tsutsui : Generation of High Resolution
Global DSM from ALOS PRISM, The International Archives of the Photogrammetry,
Remote Sensing and Spatial Information Sciences, Vol. XL-4, pp.243-248,
ISPRS, 2014. PDF file
J. Takaku, T. Tadono, K. Tsutsui, M. Ichikawa : Validation of
'AW3D' Global DSM Generated from ALOS PRISM, ISPRS
Annals of the Photogrammetry, Remote Sensing and Spatial Information
Sciences, Vol.III-4, pp.25-31, 2016. PDF file
T. Tadono, H. Nagai, H. Ishida, F. Oda, S. Naito, K. Minakawa,
H. Iwamoto : Initial Validation of the 30 m-mesh Global Digital
Surface Model Generated by ALOS PRISM, The International Archives
of the Photogrammetry, Remote Sensing and Spatial Information Sciences,
ISPRS, Vol. XLI-B4, pp.157-162, 2016. PDF file
ALOS World 3D - 30m (AW3D30) is a global digital surface model (DSM) dataset with a horizontal resolution of approximately 30 meters (1 arcsec mesh). The dataset is based on the DSM dataset (5-meter mesh version) of the World 3D Topographic Data. More details are available in the dataset documentation. …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eAW3D30 is a global digital surface model (DSM) with approximately 30-meter resolution, based on the World 3D Topographic Data.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset (V2.2) is deprecated, with an improved version available: JAXA/ALOS/AW3D30/V3_2.\u003c/p\u003e\n"],["\u003cp\u003eIt provides elevation data (AVE_DSM) along with stacking number (AVE_STK) and a mask band (AVE_MSK) for data quality assessment.\u003c/p\u003e\n"],["\u003cp\u003eWhile generally accurate, some areas contain height errors due to cloud, snow, and ice interference.\u003c/p\u003e\n"],["\u003cp\u003eThe data is freely available for use under the specified terms of the ALOS Global Digital Surface Model.\u003c/p\u003e\n"]]],["The ALOS World 3D - 30m (AW3D30) dataset, version 2.2, provides a 30-meter resolution global digital surface model (DSM) from 2006 to 2011. It features the `AVE_DSM` band for elevation data, along with `AVE_STK` for stacking information and `AVE_MSK` for masking. The data is processed using image matching with optical images, identifying and masking clouds, snow, and ice. Some data errors exist outside the valid range. The data is available for use under the specified terms. This dataset is superseded by V3_2.\n"],null,["# ALOS DSM: Global 30m v2.2 [deprecated]\n\n**Caution:** This dataset has been superseded by [JAXA/ALOS/AW3D30/V4_1](/earth-engine/datasets/catalog/JAXA_ALOS_AW3D30_V4_1). \n\nDataset Availability\n: 2006-01-24T00:00:00Z--2011-05-12T00:00:00Z\n\nDataset Provider\n:\n\n\n [JAXA Earth Observation Research Center](https://www.eorc.jaxa.jp/ALOS/en/aw3d30/)\n\nTags\n:\n alos \n dem \n elevation \n elevation-topography \n geophysical \n jaxa \ntopography \n\n#### Description\n\nALOS World 3D - 30m (AW3D30) is a global digital surface\nmodel (DSM) dataset with a horizontal resolution of approximately\n30 meters (1 arcsec mesh). The dataset is based on the DSM dataset\n(5-meter mesh version) of the [World 3D Topographic Data](https://www.aw3d.jp/en/).\nMore details are available in the dataset [documentation](https://www.eorc.jaxa.jp/ALOS/en/aw3d30/aw3d30v11_format_e.pdf).\n\nVersion 2.2, released in April 2019 is an improved version of the\nnorthern region over 60 degrees north. Along with the complement of no-data or\nlow-quality area, updating of coastline was also performed.\n\nThe AW3D DSM elevation is calculated by an image matching process\nthat uses a stereo pair of optical images. Clouds, snow, and ice are\nautomatically identified during processing and applied the\nmask information. However, mismatched points sometimes\nremain especially surrounding (or at the edges of) clouds, snow,\nand ice areas, which cause some height errors in the final DSM.\n\nHere are some example areas with data values outside of valid elevation\nrange. Impossibly low negative values are concentrated in Antarctica around\n(-63.77, -61.660), (-77.22, -150.27), and (-73.29, 168.14); in Indonesia\naround (-5.36, 134.55); in Brazil around (-1.667113844, -50.6269684);\nand in Peru around (-10.45048137, -75.39459876) with approximate values of\n-1013, -998, -635, and -610 respectively. Impossibly high\npositive values are found in several locations in the Arctic around\n(79.83, -77.67) and (69.54, -75.42); in Fiji around (-16.58, 179.44)\nand (-18.96, 178.39); and in Nepal around (28.50, 84.56) with\napproximate values of 15369, 15213, and 10900 respectively.\n\n### Bands\n\n\n**Pixel Size**\n\n30 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|-----------|---------|---------|------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `AVE_DSM` | -1054\\* | 15355\\* | meters | Height above sea level. Signed 16 bits (Little endian) raster data. Elevation (in meter) converted from the ellipsoidal height based on ITRF97 and GRS80, using EGM96†1 geoid model. |\n| `AVE_STK` | 0\\* | 54\\* | meters | Stacking number of the scene unit DSM used in producing DSM. The band is derived by resampling the stacking number for 5m resolution DSM to 30m resolution. |\n| `AVE_MSK` | | | meters | 8-bit mask for the ave band. |\n| Bitmask for AVE_MSK - Bits 0-7: Generated from resampled DSM. - 0: Valid - 1: Cloud and snow mask (invalid). - 2: Land water and low correlation mask (valid). - 3: Sea mask (valid). - 4: Void filled with GSI DTM (valid). - 8: Void filled with Shuttle Radar Topography Mission SRTM-1 Version 3 (valid). - 12: Void filled with PRISM DSM (valid). - 24: Void filled with ASTER GDEM v2 (valid). - 28: Void filled with ArcticDEM v2 (valid). - 252: Void filled with applied IDW method (gdal_fillnodata) (valid) ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n\\* estimated min or max value\n\n### Terms of Use\n\n**Terms of Use**\n\nThis dataset is available to use with no charge under\nthe conditions specified in the [Terms of use for ALOS Global Digital\nSurface Model](https://www.eorc.jaxa.jp/ALOS/en/aw3d30/).\n\n### Citations\n\nCitations:\n\n-\n\n T. Tadono, H. Ishida, F. Oda, S. Naito, K. Minakawa, H. Iwamoto\n : Precise Global DEM Generation By ALOS PRISM, ISPRS Annals of\n the Photogrammetry, Remote Sensing and Spatial Information Sciences,\n Vol.II-4, pp.71-76, 2014. [PDF file](https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-4/71/2014/isprsannals-II-4-71-2014.pdf)\n- J. Takaku, T. Tadono, K. Tsutsui : Generation of High Resolution\n Global DSM from ALOS PRISM, The International Archives of the Photogrammetry,\n Remote Sensing and Spatial Information Sciences, Vol. XL-4, pp.243-248,\n ISPRS, 2014. [PDF file](https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-4/243/2014/isprsarchives-XL-4-243-2014.pdf)\n- J. Takaku, T. Tadono, K. Tsutsui, M. Ichikawa : Validation of\n 'AW3D' Global DSM Generated from ALOS PRISM, ISPRS\n Annals of the Photogrammetry, Remote Sensing and Spatial Information\n Sciences, Vol.III-4, pp.25-31, 2016. [PDF file](https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-4/25/2016/isprs-annals-III-4-25-2016.pdf)\n- T. Tadono, H. Nagai, H. Ishida, F. Oda, S. Naito, K. Minakawa,\n H. Iwamoto : Initial Validation of the 30 m-mesh Global Digital\n Surface Model Generated by ALOS PRISM, The International Archives\n of the Photogrammetry, Remote Sensing and Spatial Information Sciences,\n ISPRS, Vol. XLI-B4, pp.157-162, 2016. [PDF file](https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B4/157/2016/isprs-archives-XLI-B4-157-2016.pdf)\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.Image('JAXA/ALOS/AW3D30/V2_2');\nvar elevation = dataset.select('AVE_DSM');\nvar elevationVis = {\n min: -9999,\n max: 15355,\n palette: ['0000ff', '00ffff', 'ffff00', 'ff0000', 'ffffff'],\n};\nMap.setCenter(136.85, 37.37, 4);\nMap.addLayer(elevation, elevationVis, 'Elevation');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/JAXA/JAXA_ALOS_AW3D30_V2_2) \n[ALOS DSM: Global 30m v2.2 \\[deprecated\\]](/earth-engine/datasets/catalog/JAXA_ALOS_AW3D30_V2_2) \nALOS World 3D - 30m (AW3D30) is a global digital surface model (DSM) dataset with a horizontal resolution of approximately 30 meters (1 arcsec mesh). The dataset is based on the DSM dataset (5-meter mesh version) of the World 3D Topographic Data. More details are available in the dataset documentation. ... \nJAXA/ALOS/AW3D30/V2_2, alos,dem,elevation,elevation-topography,geophysical,jaxa,topography \n2006-01-24T00:00:00Z/2011-05-12T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.eorc.jaxa.jp/ALOS/en/aw3d30/)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/JAXA_ALOS_AW3D30_V2_2)"]]
