Jeff Dillon
Client Services & Business Development
Jeff is your first point of contact for quotes, scheduling and project coordination.
// About
The photogrammetric mapping partner for your team.
Aerial photography and digital mapping for surveyors, engineers and agencies.
Celebrating 30 Years
Our firm
Founded in San Bernardino, Arrowhead Mapping Corporation serves civil engineers, land surveyors, land developers and municipalities. The firm is consistently awarded local, state and federal government projects and is one of the leading firms in GIS, digital mapping and digital orthophotography.
Field ground control is supplied by the client’s surveyor; Arrowhead performs the aerial photography and photogrammetric mapping.
Leadership
Principal
Steve Dillon
ASPRS Certified Photogrammetrist since 1989, Certificate #790
34 years of experience
Steve Dillon’s experience includes aerial photography, map compilation, digital topographic mapping and city-wide mapping for GIS and LIS. He has served as project manager on several Caltrans digital mapping projects, helped establish digital mapping standards for firms and cities in Southern California, and aided the development of digital orthophotography software, procedures and standards.
Education & professional development
B.S., Agricultural Engineering (Mechanization in Agriculture), Cal Poly San Luis Obispo
- Remote Sensing using Aerial Photography — San Bernardino Valley College
- Photogrammetric Close Range Applications — American Society of Photogrammetry, San Antonio, TX
- Analytical Photogrammetry — CSU Fresno
Credentials
Specialist photogrammetric expertise.
Steve Dillon · ASPRS (American Society for Photogrammetry and Remote Sensing) Certified Photogrammetrist since 1989, Certificate #790
Firm memberships
- California Land Surveyors Association (CLSA)
- American Society for Photogrammetry and Remote Sensing (ASPRS)
Principal affiliations
- American Society for Photogrammetry and Remote Sensing (ASPRS)
- American Congress on Surveying and Mapping (ACSM)
Equipment & technology
- Wild RC30 aerial camera with image motion compensation
- Versamat film processor
- Wehrli precision photogrammetric scanner
- Leica/KLT softcopy stereo instruments
Quality control
Checks at every stage of mapping.
- QC-01
Plan to the specification
Flight plans are designed for the accuracy required by the final map scale and contour specifications. Ground control is supplied by the client’s surveyor; control points are determined and shown on the supplied map.
- QC-02
Acquire and check photography
Wild RC30 photography uses image motion compensation. Flights take place on clear days with at least 5 miles visibility per FAA flight service, between 10:30 a.m. and 2:30 p.m. Photography is checked for overlap, sidelap, tip and tilt.
- QC-03
Process and scan film
Film is processed in a Versamat processor and scanned on a Wehrli precision photogrammetric scanner.
- QC-04
Compile and review each stereo model
Topographic mapping is compiled on Leica/KLT softcopy stereo instruments. Independent QC review of every stereo model checks completeness and accuracy.
- QC-05
Consolidate and review CAD
A CAD editor consolidates models into a master DTM file and a separate planimetric file. Contours are generated from the DTM, and final CAD is reviewed again on the stereo instrument.
- QC-06
Generate and verify orthophotos
Black-and-white and color orthophotos are generated from the final DTM, typically at 0.25 ft pixel size, varying with project size. The planimetric file is overlaid on the orthophoto to check horizontal position. Products meet or exceed National Map Accuracy Standards; accuracy is specified per project.
// Request a quote
Have a project on the board?
Send us your plans and schedule. We'll respond with a clear scope, fee and timeline.
Questions or quotes: Jeff Dillon, jeff@arrowheadmapping.com · (909) 889-2420