Arizona Height Modernization Program - AZHMP Dave Minkel NGS Geodetic Advisor to Arizona Geospatial Professional, APLS.

Arizona Height Modernization Program - AZHMP

Dave MinkelNGS Geodetic Advisor to ArizonaGeospatial Professional, APLS

Presentation Outline

• Why Did We Pursue a Height Mod Grant?– Problems with the Network– Additional Benefits Expected

• How Did We Get an HM Grant?– Activities – Documents

• What Do We Plan to Do Under AZHMP?– Long-term Plan– Near-term Plan

• Long-term Plan for AZHMP

Why Did AZ Pursue a Height Mod Grant?

• Vertical Control Network Issues– Dated

• Latest “Campaign” Leveling in 1992• Not All Marks are NAVD 88



• Latest “Campaign” Leveling in 1992• Not All Marks are NAVD 88• Subsidence

DU01050 -2.302 ft

DU01051 -2.282 ft

0.73 miles

1967 - 1980; Elevation Change

2006 – Elevation Change (error) could be double, i.e. -4.604 ft & -4.564 ft, from published 1980 elevation (last year of leveling)



• Latest “Campaign” Leveling in 1992• Not All Marks are NAVD 88• Subsidence

– Sparse Where We Need It• Development = Bulldozers = Lost Marks

• Additional Benefits– Tie the PLSS to the Network

• GDACS Project

How Did AZ Get a HM Grant?• Activities

– HM Forum in 2004– Congressional Delegation Briefings

• AZ State Cartographer & Private Sector Representatives

• Local and D.C. Offices Visited– Consider Congressional Schedule

• Documents– AZHMP 3-Ring Binder

• Discuss APPLICATIONS & BENEFITS to the Public, not what you’re going to do!

– AZHMP 1-Pagers (Leave Behinds)– 10-Year Plan– AZHMP Web Site

• http://agic.az.gov/hm/

What Do We Plan to Do Under AZHMP?

• Long-term (10-Year) Plan– Arizona Spatial Reference Center– AZCORS (CORS/COBS)– GPS Statewide Network (≈ 3800 stations)

• Uses GDACS Model (i.e. near PLSS Corners)– Leveling

• Analysis of Network• Leveling

– Support/Research

AZHMP 10-Year Plan

What Do We Plan to Do Under AZHMP?

• Long-term (10-Year) Plan– Arizona Spatial Reference Center– AZCORS (CORS/COBS)– GPS Statewide Network (3800 stations)– Leveling

• Analysis of Network• Leveling

– Support/Research• Near-term Plan (FY06 Funding)

– Establish AZCORS

Long-term Plan for AZHMP

• Build Partnerships with Federal, State and Local Agencies– Utilize Partner Resources to Implement

AZHMP and Gain Additional Program Support

• Seek Additional Funding Sources– FEMA Grant(s)

• Demonstrate and Document Public Benefits of AZHMP

• Migrate AZHMP from Grant-based Funding to State Programmatic Funding

Do You Need a HM Grant to Move Forward?

• Gila County– Approximately 122 Stations set– FEMA partnership on Tonto Basin saved ~

$265K – 30 sq. mi.– 28% savings on aerial mapping costs

• Cochise County– Approximately 138 Stations Set– Requiring ties to network for County GIS– 38 Stations in Last Survey

• 2 Companies Turned Down