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MEMO 93 <br />............................................................................................................. <br />(1) Data Preprocessing <br />Satellite imagery selection <br />and acquisition procedures <br />~/ ~ ask 93.2-4 <br />Geometric correction of <br />satellite and aerial imagery <br />Task 93.3 <br />Scan line corrections for <br />select Landsat MSS scenes <br />Radiometric and atmospheric <br />correction of satellite imagery <br />~h ".ask 93.2-3 <br />Image enhancement <br />(NDVI transformations) <br />........................................................................................................................................................................................................................................ <br />(2) Analysis, Interpretation and Classification <br />°` <br />Classification of irrigated <br />lands <br />Manual delineation of <br />irrigated parcel boundaries <br />.~a3 <br />Maximum likelihood <br />classification of crop types <br />Tasks 93.2-3 <br />(4) Evaluation and Validation <br />Post-classification of crop <br />types per parcel - <br />Summary evaluation, <br />revisions, and QC/QA <br />Classification refinement <br />(Final map of irrigated crops) - - - -.... - -- ....._..__ <br />(3) Wells Matching & Service Areas <br />,`,~;~~ 93.E T<~~ 9~„5 <br />Historic diversion Historic ditch <br />structures service areas <br />~g '. <br />Historic parcel to <br />well assignment <br />Figure 1. Flowchart of the SPDSS historic land use mapping procedures. <br />In the case of Landsat MSS, data was ordered in the Space Oblique Mercator (SOM) projection, the <br />native projection of the Landsat MSS satellite. <br />Page 2 of 59 tij,Rareradde ~eshn~P~gy, ~os~ <br />