(LAC-57) Geologic map of the Kepler region of the moon
December 18, 2019

The origional Geologic map was created in 1965 from Lunar Base Chart USAF-ACIC imagery. To make this map more useful with modern data it has been georeferenced to align with the more modern 2013 LROC-WAC global mosiac. Links used to transform the data are included with this documentation. A polyline feature class was created to digitize contacts at 1:200k, and attributed with contact type. A polygon feature class was created from this polyline feature class, attributed with geologic unit labels, and symbolized based on RGB values identified from the map sheet TIFF in Adobe Photoshop.

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Data are saved in a feature dataset in I355_Kepler_LAC57_1M.gdb

I355_GeoContacts (polyline feature class)
I355_GeoUnits (polygon feature class)

Moon2000_Mercator_CLon40
Projection    	Mercator

Zunits        NO                                                                
Units         METERS                                                            
Xshift        0.0000000000                                                      
Yshift        0.0000000000                                                      
Parameters 1737400.0000000000  1737400.0000000000                               
40.000 /* longitude of central meridian                                   
1.000 /* latitude of true scale                                          
0.00000 /* false easting (meters)                                       
0.00000 /* false northing (meters)
11.7500 /* Standard parellel 1
Separate shapefiles of the two feature classes are located in the ...Data/Shapefiles/ directory.

The coordinate system used for this digitization is based on the coordinate system stated on the map sheet and is stored in ...Documentation/CoordinateSystems/ directory.

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Basemaps have not been included in this download package, but the most current base using THEMIS data is available through ArcGIS Online or can be downloaded at the following link:
https://astrogeology.usgs.gov/search/map/Moon/LRO/LROC_WAC/Lunar_LRO_LROC-WAC_Mosaic_global_100m_June2013

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Below are the RGB values sampled from the scanned map sheet used to symbolize geologic units and saved as a layer (*.lyr) file in the ...Data/LayerFiles/ directory.

Unit		R	G	B

Cr		254	241	138
Crd		223	153	105
Cf		254	136	101
Cs		255	204	144
Eir		213	143	111
Eif		179	132	103
Er		210	229	151
Ef		163	214	106
Pd		253	145	149
Pm		255	208	215
Iar		225	170	192
Iaf		167	141	176
Ir		169	229	225
rc		179	137	141


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For more information, contact:
Michael Ortigoza
Mortigoza@contractor.usgs.gov
USGS Astrogeology Science Center
Flagstaff, AZ
(928)556-7177