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Gold Prospecting
Gold Maps & Resources
Heathcote reef lines and alluvial areas for Google Earth - from Lidar
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<blockquote data-quote="casper" data-source="post: 645862" data-attributes="member: 562"><p>Well I got it sussed out...... My DEM download is the <em>1 second Shuttle Radar Topography Mission (SRTM) Digital Elevation Model Version 1.0 package </em>which comprises three surface models: the Digital Elevation Model (DEM), the Smoothed Digital Elevation Model (DEM-S) and the Hydrologically Enforced Digital Elevation Model (DEM-H). The DEMs were derived from the SRTM data acquired by <em>NASA in February 2000 </em>and were publicly released under Creative Commons licensing from November 2011 in ESRI Grid format. Digging a little deeper I find that the 1 second data is a 30metre grid - so I'm looking at 30x30metre squares in my image rather than 0.5x0.5metre (50x50cm) squares in the OP's Heathcote pic where the data is just 2 years old compared to 20 years for my data.</p><p>I'm encouraged to look at few prospective panning locations to see what is under the tree canopy so hopefully the DEM data is up to date in those areas.</p></blockquote><p></p>
[QUOTE="casper, post: 645862, member: 562"] Well I got it sussed out...... My DEM download is the [I]1 second Shuttle Radar Topography Mission (SRTM) Digital Elevation Model Version 1.0 package [/I]which comprises three surface models: the Digital Elevation Model (DEM), the Smoothed Digital Elevation Model (DEM-S) and the Hydrologically Enforced Digital Elevation Model (DEM-H). The DEMs were derived from the SRTM data acquired by [I]NASA in February 2000 [/I]and were publicly released under Creative Commons licensing from November 2011 in ESRI Grid format. Digging a little deeper I find that the 1 second data is a 30metre grid - so I'm looking at 30x30metre squares in my image rather than 0.5x0.5metre (50x50cm) squares in the OP's Heathcote pic where the data is just 2 years old compared to 20 years for my data. I'm encouraged to look at few prospective panning locations to see what is under the tree canopy so hopefully the DEM data is up to date in those areas. [/QUOTE]
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Gold Prospecting
Gold Maps & Resources
Heathcote reef lines and alluvial areas for Google Earth - from Lidar
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