Historical aerial scanning project

Post on 12-Dec-2014

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Presented at the 2011 Texas GIS Forum

transcript

Shannon Wade | Jordan Thomas

• Costal Impact Assistance Program• What does it do?

• The CIAP program provides funds to Outer Continental Shelf oil and gas producing States for the conservation, protection and preservation of coastal areas, including wetlands. (BOEMRE, 2011)• States include Alabama, Alaska, California, Louisiana, Mississippi, and

TEXAS!

• The Texas Water Development Board (TWDB) will digitize the coastal historical photography of the Texas coast for selected decades between 1940 and 1990

• This project will serve as a historic and educational record of visualizing coastal change and erosion through time!

• In an average month at TNRIS the 4 interns could…

• Generate approximately 5200 scans of archived historical aerial photos at 800dpi OR approximately 2600 scans at 1000dpi.

• Or produce approximately 625 georeferenced frames.

• Each aerial scanned ensures permanent preservation of the historic photo and prevents it from becoming damaged or misplaced.

• The georeferencing of these frames is one step in providing the public free, downloadable access to the historic archives of TNRIS.

Scan

Reference

Mosaic

Test

From a file cabinet of historic photos, to a seamless functional data layer!

• Bring in scanned image and local mosaic

• Set resampling settings and HTML metadata autogeneration

• Collect manual points

• Auto Point Generation!

• Image Check

• Output

• Edge Match• Mosaic Pro

• Seam Lines• Attributes and Editing

• Output Image• Color Corrections

• Image Dodging• Overlap Function

• Feathering• Smoothing• Resolution

• Post Process• Stretch• Sharpen• Export as JPEG2000

Raw .Img Mosaic

LUT Stretched .Img Mosaic

• Let us demonstrate!

• You Win! (The State)• An extremely efficient and low cost

solution to digitizing the State’s historic aerial photo archive!

• Free, downloadable, 24-hour access to the digital archive via GEMSS!

• Access to a high-quality, seamless and collarless, historic county-wide photo layer!

• County layer and individual frames are ALREADY GEOREFERENCED and come with metadata!

• All of this means you can save time, money, and a trip to our windowless basement!

• We Win! (The Interns)• We learn valuable, hands on

experience using GIS on real world projects!

• Our increased GIS skill set and experience gives us an edge over our peers increasing my marketability when applying for professional jobs!

• We get to work beside experts in the GIS field and can get quick, accurate answers to our GIS and mapping questions!

• We are able to work on a variety of projects diversifying our experience!

• We can earn college credit through our internship!

Ask the interns!

TNRIS Interns 2011: Hunter, Shannon, Joey,…And Elliott.