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I need to extend my digital elevation map (10m or 30m will do) into Baja from southern CA.

closed as unclear what you're asking by Dan C, whyzar, Andre Silva, user2856, BERA Sep 13 '18 at 5:32

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There is SRTM 1 arcsec (that is approx. 30m) global data (land between parallels 60N and 60S respectively) available to download from https://earthexplorer.usgs.gov/. Just click the location, follow to the another tab "Data Sets" and locate Digital Elevation -> SRTM -> SRTM 1 Arc-Second Global. Proceed to "Results" tab and follow the "Download" icon.

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You can download the Alos Palsar data. The DEMs have a resolution of 12.5 m derived from SAR with a date until 2011. You can enter by this link https://vertex.daac.asf.alaska.edu/

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