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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Baldwin Co. Baldwin Co. shown in yellow

Milledgeville shown in red

Baldwin shape.shpPreliminary boundary.shp

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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

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Preliminary boundary.shp

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Preliminary boundary.shpContour.shpNew_contour2.shp

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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

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Areas of Interest in the Transfer

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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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Final polygon.shpProp lines 2 shp.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

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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)