About Company

Sigma Geospatial LLC is a Tucson-based land surveying and geospatial services firm that provides boundary surveys, topographic surveys, ALTA/NSPS surveys, construction staking, lot splits, preparation of legal descriptions, and other residential and commercial surveying solutions across Pima County and surrounding areas; Sigma Geospatial employs experienced, Arizona-registered land surveyors (Arizona RLS #78545), is commercially and professionally insured, offers prompt scheduling for field work, and is led by Robert A. Lopez, PLS and James A. Crabtree III.

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