add dowlow and leaton

Dowlow/EM_cond_3_tiff.TAB

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+!table
+!version 600
+!charset WindowsLatin1
+
+Definition Table
+  File "EM_cond_3_tiff.tif"
+  Type "RASTER"
+  (410156.241529157,368302.443773706) (0,0) Label "Pt 1",
+  (410331.028579439,368302.443773706) (14200,0) Label "Pt 2",
+  (410156.241529157,368200.772876698) (0,8260) Label "Pt 3"
+  CoordSys Earth Projection 8, 79, "m", -2, 49, 0.9996012717, 400000, -100000
+  Units "m"
+   RasterStyle 4 1
+   RasterStyle 7 16777215
+   RasterStyle 8 255