State Property Transfer GIS 4100 Dr. Oetter By Shea Groebner and Michael Bender May 4, 2004.
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Transcript of State Property Transfer GIS 4100 Dr. Oetter By Shea Groebner and Michael Bender May 4, 2004.
State Property TransferGIS 4100
Dr. Oetter
By
Shea Groebner and Michael BenderMay 4, 2004
Problem Statement
• Our project arises from a proposal to transfer some Central State property to the Baldwin State Forest. A boundary description of the area to be transferred is necessary. We plan to use GPS information obtained in the field as well as GIS to create and map the new boundary line. The importance of this survey is so that the state does not have to pay a surveyor thousands of dollars to complete the description.
Mission Statement of Central State Hospital
• “…to serve the needs of people with mental illness, developmental disabilities, and substance abuse while emphasizing habilitation and health and providing acute medical services and skilled and supportive nursing care, as we seek continuing improvement in the quality of our care”.
Mission Statementof State Forest Lands
• “…these lands incorporate forest stewardship (multiple resource) management, including forest products, wildlife, recreation, soil and water conservation, aesthetics, historical and cultural resources”.
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9000000 0 9000000 18000000 Miles
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Baldwin Co. Baldwin Co. shown in yellow
Milledgeville shown in red
Baldwin shape.shpPreliminary boundary.shp
1000000000 0 1000000000 2000000000 Meters
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Baldwin Co. with overlay of aerial photo and
preliminary transfer tract
Preliminary transfer area considerations
• Inclusion of historical site
• River frontage
• Existing property boundaries
• Roads
• Exclusion of developed areas
• Inclusion of public access boat ramp
Digital Raster Graphic (DRG) used to digitize contour lines
of the boundary
60000000 0 60000000 120000000 Meters
Preliminary boundary.shp
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Preliminary boundary.shpContour.shpNew_contour2.shp
100000000 0 100000000 200000000 Meters
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An attempt to utilize contours in the description
Problem areas from visual inspection of site
Pond
Field
Historic Fort W ilkinson
Morali's Land
Culver-Kidd
Boat Ramp
Area of Concern
Prison
Private Landowner Boundary
Oconee River
Access from Road
Pond digitized.shpField digitized.shpPreliminary boundary.shp
100000000 0 100000000 200000000 Meters
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Areas of Interest in the Transfer
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# Goodpts.shp
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Points used to create a boundary
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Prop lines 2 shp.shp# Goodpts.shp
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Path extension used to form lines between the points
FROM_ID TO_ID CENT_BEAR CENT_DIST
1 2 320.1987 383.0568
2 3 225.2445 204.5628
3 4 250.4870 91.1442
4 5 238.7128 265.2630
5 6 323.9584 111.0061
6 7 261.7809 57.5708
7 8 173.3910 50.0453
8 9 140.8735 150.8944
9 10 89.0631 227.1049
10 11 174.3095 130.3558
11 12 75.9638 57.7235
12 13 124.8245 28.0179
13 14 171.5730 27.2947
14 15 236.8887 27.4591
15 16 233.1301 65.0000
16 17 235.6197 46.0435
17 18 155.1522 128.4034
18 19 93.7542 114.2889
19 20 134.7732 36.2290
Bearings and Distances Between Points
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50000 0 50000 100000 Miles
Final polygon.shpProp lines 2 shp.shp
# Goodpts.shp
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Final area to be transferred
Tract 4
Tract 3
Tract 5
Tract 2 (part of Selma Transfer)
Tract 1 (part of Selma Transfer) 5poly.shp4poly.shp3poly.shp2poly.shp1poly.shp
100000000 0 100000000 200000000 Meters
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Revised Transfer Area Division
• Increase accuracy and precision of points used
• Locate more of the existing survey pins from previous surveys of the area
• Establish precise and accurate control points
• Find extension enabling you to put in bearing and distances from a known control point to establish other points( granite markers from adjacent properties)
• Find extension enabling you to calculate area of each polygonal tract
• Separate tracts defined using bearing and distances from control points
Suggestions and Additional Work Required for Survey Grade Completion
Pitfalls and Speedbumps
• Should not have tried to use contour lines(not acceptable for survey work)
• Handheld GPS not accurate enough• All points and lines need to be referenced to
existing control points• Equipment check prior to taking into the field• Recent transfers and surveys may not be on the
courthouse aerial property photos (Alltell property and Selma Transfer)