Adiseño is a hand-drawn map of a Spanish or Mexico land grant that was submitted to the U.S. government indicating the extent of a land grant as understood by the grantees.[1]Anexpediente is a written description of the grant. These documents were used during the U.S. land-patent process that began when Mexican Alta California became the U.S. stateofCalifornia in 1850.[1] Diseños are distinct from later maps produced by U.S. surveyors within the extant American rectangular survey system.
Diseños may have missing or poorly described coastal features because cattlemen who ran the ranchos generally did not make use of the shoreline or own boats.[2]
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