Company Overview

The offices of DobleThomas & Associates provide professional land surveying, urban planning, civil engineering, GIS, aerial photography, photogrammetric mapping and land development permit processing services throughout Northern California.  The efficiency of these disciplines combined is advantageous for our clients as both savings in time and overall project costs.




Our office employs a team approach to all projects utilizing state of the art support systems in surveying and computing, which enables us to tackle even the most technically complex projects.  DobleThomas & Associates has two office locations along the Russian River in Sonoma and Mendocino Counties serving both public and private clients.

Advanced GIS Mapping Services are rendered to the Wine Industry, the Real Estate Profession and Municipalities. An example of our GIS Services is EveryVine, an online Interactive GIS Mapping site with very sophisticated analytical resources utilized by the wine industry. We also publish official AVA Maps for many Viticulural Regions. To purchase our American VIticultural Maps please visit the product page at EveryVine.

DobleThomas is closely affiliated with Delta Geomatics Corporation in Santa Rosa.  Delta Geomatics is the former photogrammetry division of Hogan-Schoch and Associates in Sebastopol.  Delta’s library of Northern California aerial images dates back to the late 1950’s.  Bradley A. Thomas is the Vice President of Delta Geomatics Corporation.

Thank you for visiting our website, we all look forward to being of assistance to you. Feel free to contact me by phone at (707) 525-1222 x503 or via email at

Bradley A. Thomas, PLS