Final UVA Internship Final UVA Internship PresentationPresentation

Abby Frazier, Brendan Mold,

Marc Kavy, Burton Putrah,

Scott Gilbert & Michael Oldham

Spring 2008

OverviewOverview

• Over the course of the semester, we were able to complete the parcels from five towns: Bakersfield, Berkshire, Fairfield, Fletcher and Sheldon: 434 parcels total

• We were able to establish common problems and solutions while transferring these paper maps into a digital geodatabase

MethodsMethods

ENTERING COORDINATES

While georeferencing, right click on the tick mark to bring up the XY coordinate input menu.

ENTERING COORDINATES

Each tick mark requires the easting and northing data to be manually entered into ArcMap. Clear handwriting and accurate coordinate information helps eliminate error in this respect.

USING THE EDITOR TOOL

After successfully georeferencing four tick marks for each parcel, the pencil tool in the Editor toolbar is used to digitally draw in the parcel boundaries. Upon completion, successful parcel boundaries are saved into the shapefile/database.

ProblemsProblems

ArcMap turns tiff files into white noise

Colored in orthophotos and multiple maps taped together…

All 4 east or north coordinates are the same, or barely any coordinates at all!Some also have no ground features to line up or even names on the map…

Also, any map with a false easting (East coordinate in the 100,000s) had to be adjusted with the figure of 347,599.695

Not to scale? Split up parcels?

A: False easting shift

B: Crosses town boundary

Overlapping parcels

Week Of:Week Of: ParcelsParcels Hours CommittedHours Committed11-Feb 13 22.75

18-Feb 29 27.25

25-Feb 16 22.25

3-Mar 22 26.5

10-Mar 6 6

17-Mar 8 13

24-Mar 33 24.5

31-Mar 51 34.5

7-Apr 49 29.5

14-Apr 42 31

21-Apr 44 43.75

28-Apr 121 71.75

TOTAL: 434 352.5

Number of Parcels Completed vs. Number of Hours Committed

0

15

30

45

60

75

90

105

120

135

Week

1

Week

2

Week

3

Week

4

Week

5

Week

6

Week

7

Week

8

Week

9

Week

10

Week

11

Week

12

Parcels Completed

Hours Committed

EfficiencyEfficiency

EfficiencyEfficiency

Average Pacels per Hour

0.57

1.06

0.720.83

1

0.62

1.361.48

1.66

1.35

1.01

1.7

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

Week1

Week2

Week3

Week4

Week5

Week6

Week7

Week8

Week9

Week10

Week11

Week12

tim

e (h

ou

rs)

EfficiencyEfficiency

Number of Parcels Digitized

66

43

134

97

41

0

20

40

60

80

100

120

140

160

Bakersfield Berkshire Fairfield Fletcher Sheldon

Town Name

EfficiencyEfficiency

Percentage of Parcels Digitized

7975

79

91

72

0

10

20

30

40

50

60

70

80

90

100

Bakersfield Berkshire Fairfield Fletcher Sheldon

Town Name

Per

cen

t

RecommendationsRecommendations

• Establish a higher minimum standard for accepting maps– Only accept maps in NAD83– Make sure each map has at least 4 reference

coordinates (that make sense)– Consistency linking spatial and attribute data– High resolution scanning or digital copy

The Next Step…The Next Step…

• Reconciling the overlap issues using geodatabase topology– Collaborating with county forester to

determine actual boundaries