First public release of Kaguya data |
First public release of Kaguya data |
Nov 2 2009, 05:07 AM
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#1
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I just received the following from Shin-ichi Sobue at JAXA:
QUOTE The Japan Aerospace Exploration Agency (JAXA) released data from the lunar explorer "KAGUYA" (SELENE) (L2 products) during the nominal operation phase (from December 21, 2007 to October 31, 2008) to the public through the Internet. I wish I could post some images but I'm having a bit of trouble with the Data Archive website -- got registered OK, but my searches seem to return database errors. And I couldn't seem to find my way to Terrain Camera data. Perhaps it's because my brain is somewhat mushy from a day of football and beer But I give up for the night and give you guys the link in the hopes you can figure out how to get pretty pictures out of this website!L2 products are calibrated/validated processed data from KAGUYA science mission instruments. By using the L2 products, researchers all over the world are expected to advance the scientific analysis and applicability investigation of the Moon. "KAGUYA 3D Moon NAVI" services, which can show KAGUYA data using a three-dimension geographic information system (WebGIS) through the Internet, have also commenced. The developed software is based on NASA "World Wind" and the KAGUYA's images and data can be displayed using the 3D map projection function. It is necessary to download and install the free software. Please refer to the following homepage for details. L2 products during the extended operational phase (until June 2009) are scheduled to be released after processing and calibration/validation are finished. 【KAGUYA(SELENE) Data Archive】 http://www.soac.selene.isas.jaxa.jp/ 【KAGUYA 3D Moon NAVI】 http://wms.selene.jaxa.jp/3dmoon/index.html I've attached the whole doc that Shin-ichi sent me, which contains a little more info about the data sets in the release. --Emily
Attached File(s)
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Nov 10 2009, 12:50 AM
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#2
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Newbie Group: Members Posts: 14 Joined: 9-November 09 Member No.: 5032 |
I downloaded the Kaguya LALT_GGT_NUM data set from JAXA and built a digital terrain model with ArcGIS software. I then applied some hypsometric rendering techniques and made these maps. Here's the first map, a global view of the moon built from the surface model and no albedo data.
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Nov 21 2009, 06:29 PM
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#3
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Newbie Group: Members Posts: 1 Joined: 20-November 09 Member No.: 5053 |
I downloaded the Kaguya LALT_GGT_NUM data set from JAXA and built a digital terrain model with ArcGIS software. Really nice work Michael. Could you give a short tutorial on how to import the data and convert it into a DEM? What projections are to be used? |
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Nov 22 2009, 04:43 AM
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#4
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Newbie Group: Members Posts: 14 Joined: 9-November 09 Member No.: 5032 |
Really nice work Michael. Could you give a short tutorial on how to import the data and convert it into a DEM? What projections are to be used? Carsten, I'm glad you like the maps. My method applies the following steps with ArcGIS software (www.esri.com): After downloading the large LALT_GGT_NUM dataset from the JAXA, I used an ArcGIS tool called "ASCII 3D to Feature Class". This tool is designed to import an ASCII file with x,y,z values to create a multipoint feature class, a point data structure designed to scale up to billions of elevation points, such as you encounter with lidar data. From the multipoint feature class, I created a terrain dataset. A terrain dataset is a generic GIS data structure which is essentially a multi-resolution triangulated irregular network. See http://webhelp.esri.com/arcgisdesktop/9.3/...ataset_concepts From the terrain dataset, I exported a raster dataset. From the raster dataset, I applied a geoprocessing model that applies two cartographic effects: hillshaded-relief plus hypsometric tints using a color ramp. This model is described at http://blogs.esri.com/Support/blogs/mappin...de-toolbox.aspx This technique is a modern implementation of shaded relief pioneered by the Swiss cartographer, Eduard Imhof, in his classic book, Cartographic Relief Presentation, first published in 1965. In those maps, I use two map projections, Mollweide for the full global view of the Moon, and Orthographic for the four hemispheric views. Through my work, I have access to the ArcGIS software suite. This is professional grade GIS software that most space enthusiasts could not casually purchase, so I know that my method is not easily adapted by most on this forum. But this was a quick and fun project for me because I am presently writing a textbook on geographic data modeling and this was a good application of terrain visualization methods. Also, when I examined the DEM built from the LALT_GGT_NUM dataset, I found a large fictitious lunar mountain at selenographic coordinates 16d 11m N, 87d 33m E I made a slope map from the Kaguya DEM and categorized the peaks with the greatest slopes on the Moon. Some suspicious lunar peaks are at 48 19 S, 141 22 E, 63 degree slope 16 11 N, 87 33 E, 60 degree slope 20 56 N, 60 32 E, 58 degree slope 48 11 S, 8 48 W, 56 degree slope 32 26 S, 58 57 E, 55 degree slope 22 15 N, 81 53 E, 52 degree slope 59 11 S, 46 16 E, 50 degree slope 61 38 N, 8 16 W, 47 degree slope 66 29 N, 70 10 W, 46 degree slope I don't necessarily assert each one of the peaks are false, but they are suspicious because of their high slope values. regards, Michael Zeiler ESRI |
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