Forest Inventory Sampling Grids

1
Forest Inventory Sampling Grids

• In ArcMap, select view Toolbars
  Hawths Tools
• Mouse over Sampling Tools from the Hawths Tools
  drop-down menu
• Chose either Generate Random Points or
  Generate Regular Points

2
Generating Random Points

• Select a layer from the dropdown menu
• A polygon layer such as a tract or property
  boundary that you wish to sample
• Check Prevent points from occurring in the
  polygons of this layer and select layers from
  the drop down menu if neccessary

3
Generating Random Points

• If desired, check Enforce minimum distance
  between points and enter desired distance
• Distance is in same units as the selected layers
  projection
• Ex. State Plane Coordinate System, NAD83,
  Kentucky Single Zone (U.S. Survey Foot)
  projection distance is in feet

4
Generating Random Points

• Select type of sampling design and enter the
  number of random points desired
• For Stratified sampling designs you must select
  a Polygon unique ID field
• Not necessary for Unstratified sampling design
• Select the folder icon to name and save the
  shapefile in your desired location.
• Press OK

5
Generating Random Points
6
Generating Regular Points

• Select Extent Same as this layer and select the
  desired layer from the pull down menu
• Enter the desired Point spacing
• Spacing is in the same units as the layer
  projection
• Select Alignment of alternating rows using the
  toggle buttons
• Name and save the new Shapefile using folder icon
• Press OK

7
Generating Regular Points
8
Clipping Points to a Layer

• Select the red toolbox icon to open the
  ArcToolbox window
• Select Analysis Tools Extract Clip
• Select the points layer you wish to clip from the
  Input Features drop down menu
• Select the boundary layer from the Clip
  Features drop down menu
• Enter name and save location under Output
  Feature Class
• Press OK

9
Clipping Points to a Layer
10
Uploading Points to GPS Unit

• Plug sync cable into computer and then into GPS
  unit
• GPS unit must be turned on
• Open DNR Garmin Software
• Select GPS Set Port Port 5 (Port 1
  when not using USB adaptor)

11
Uploading Points to GPS Unit

• Select File Load From File
• Select Shapefile and choose Open
• Change Identity or Comment fields as desired and
  choose OK
• Choose OK in pop-up window, points should appear
  in DNR data table
• Select Waypoint Upload

12
Exporting Points from GPS Unit

• Plug sync cable into computer and then into GPS
  unit
• GPS unit must be turned on
• Open DNR Garmin Software
• Select GPS Set Port Port 5 (Port 1
  when not using USB adaptor

13
Exporting Points from GPS Unit

• Select GPS Open Port
• Select GPS Units Feet
• Select File Set Projection Select
  ESRI Datums/Projections
  NAD_1983_StatePlane_Kentucky_FIPS_1600_Feet
• Press OK

14
Exporting Points from GPS Unit

• Select Waypoint or Track Download
• Highlight points or tracks you want to download
• Select File Save to Select Save as
  type ArcView Shapefile (Projected) (.shp)
  Enter File Name Press Save