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Using TwoDog Inventory Software. Introduction. TwoDog allows you analyze data on 3 levels- Point, Stand, Tract A point is a single location at which you collect data typically through point sampling or plot sampling.

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Presentation Transcript
introduction
Introduction

TwoDog allows you analyze data on 3 levels- Point, Stand, Tract

A point is a single location at which you collect data typically through point sampling or plot sampling.

A stand is an area in which you collect data (ex. Size, wildlife, accessibility, forest type).

A tract is the entire collection of stands that make up a management area.

introduction1
Introduction
  • To collect and analyze data you must:
    • Define a method set
      • TwoDog Method Manager organizes method sets that can be changed for each point in order to collect appropriate data.
    • Collect data following method set
      • Pocketdog can be used in the field to record and save data.
    • Analyze data and generate reports
      • Once uploaded into Officedog, data can be used for various calculations
introduction2
Introduction
  • Officedog can create the following reports:
    • Tally Outputs by Point Number
    • Stand Level Tables
    • Stand Level Summaries
    • Stand level Topwood Summaries
    • Stand Level Characteristics
    • Text Data
    • Tract Level Tables
    • Tract Level Summaries
    • Tract Level Topwood Summaries
    • Tract Level Statistics
method sets
Method Sets
  • Two dog allows you to create method sets in which different methods can be used to record and calculate data for specific objectives.
    • Such as a method which involves fixed radius sampling and another method which involves point sampling (ie. prism cruise).
  • Able to store up to 9 method sets
method sets2
Method Sets
  • Primary purpose of method sets are to:
    • Specify inventory methods
      • Prism and plot sampling
    • Define species codes
    • Products and product groups
    • Define volume tables
  • Once this method set is saved, job files can be made using them.
slide11

TwoDog Inventory Method Template

  • The method template contains one inventory type
  • Method 1:
    • 10 BAF prism plot (> 5 inch dbh)
    • 1/100 acre plot (1 to 4 inch dbh)
    • 1/385 acre plot (< 1 inch dbh)
  • Notes:
  • For trees between 1 to 4 inch dbh, do not record merchantable height in logs
  • For trees < 1 inch dbh, do not record merchantable height in logs and dbh
  • Available on the course website: FOR480_Ver3.zip
  • To use, unzip cruise method template files into c:\Program Files\tdw20\Methods
slide13

Combined Prism and Fixed Area Plot Sampling: Method 1

Nested Plots

10 BAF Prism Sample

Trees > 5 inch dbh

1/100 acre plot

Trees 1to 5 inch dbh

1/385 acre plot

Trees < 2 inch dbh

FOR 220 Aerial Photo Interpretation and Forest Measurements

slide14

Comparing Point Sampling and Fixed Area Plot Sampling

FOR 220 Aerial Photo Interpretation and Forest Measurements

slide15

Point Sampling

(Overhead view)

Each tree has a given plot size in relation to it’s size.

How many of these plots does our point fall into?

FOR 220 Aerial Photo Interpretation and Forest Measurements

slide16

Point Sampling

Using a prism:

?

Offset tree bole in prism

does overlap actual tree bole

Borderline tree - must

measure distance from

point center

Offset tree bole in prism has no

overlap with actual tree bole

slide17

Point Sampling

Important Ideas about Point Sampling

1. Basal Area Factor (BAF)

How much BA does each sampled tree represent?

2. Plot Radius Factor

How far away can a tree be and still be sampled?

slide18

Calculating basal area from a point sample:

  • Example:
  • BAF 10 prism
  • 202 trees tallied
  • 25 points

FOR 220 Aerial Photo Interpretation and Forest Measurements

slide19

Plot radius factor

The value to use in determining the maximum distance a tree of a

given diameter can be from the point to still be tallied.

For example, when using a BAF 10 prism, the plot radius

factor is 2.75.

Which means:

For each inch of dbh, a tree can be 2.75 feet from the point to still

be included in the point’s tally.

Thus a 12 inch tree can be up to 33 feet (12 x 2.75) from the point and

still be included in the point’s tally.

FOR 220 Aerial Photo Interpretation and Forest Measurements

slide20

TwoDog Data Entry

  • Notes:
  • For trees between 1 to 4 inch dbh, do not record merchantable height in logs
  • For trees < 1 inch dbh, do not record merchantable height in logs and dbh
creating a new twodog job file
Creating a New TwoDog Job File
  • From the File menu, Select “Open or Create”
  • Enter a filename for the new job
  • Select a method set from the “Using Method Template” dropdown menu: FOR480_Ver3
  • Select Create File
    • Window title now contains the name of the job you created, which is now the current job
  • Select Close
opening an existing job
Opening an Existing Job
  • From File menu, select “Open or Create”
  • From the “Select an Existing Job” list, select the job you want to open
    • Your selection automatically becomes the current job
  • Select Close. You are now ready to enter data.
saving your work
Saving Your Work
  • Office dog automatically saves your work when you change tabs on any data entry window
    • Tract, Stand, or Point
  • Automatically saves your work when you move to a new tree or to a new point on the Tree Data Tab in the Point Data window
entering tract data
Entering Tract Data
  • From the Field Data menu, select Tract Data
  • Navigate using tabs at the top of the Tract Data window
    • Available tabs depend on the job’s method set
  • Type data in desired text fields and/or select the appropriate choice from dropdown lists
entering stand data
Entering Stand Data
  • From the Field Data menu, select Stand Data
  • Enter a stand ID name under the “ID” field
  • Select the cruise method from the method number drop down list
    • Method 1: 10 BAF prism sample with fixed area small tree (1/100 ac) and regeneration (1/385 ac) plots
  • Type data in text fields and select choices from dropdown lists under desired tabs
changing stands
Changing Stands
  • In the Stand Data window you can:
    • Edit current stand, change to another stand, or create a new stand
  • To change stands: Use scroll bar at bottom of window to move to the appropriate stand
  • To add a new stand: Select Add
    • Numbers new stands sequentially, or enter any integer not already assigned
entering point data
Entering Point Data
  • At least one stand must exist before the point data window can be opened
    • Simply opening the stand data window automatically creates stand 1
  • From the Field Data menu, select Point Data
  • Entering Tree Data can be done by typing values into the cells, or choosing them from a list (right-click an empty cell)
  • Entering data under the various tabs is similar to the Stand and Tract Data windows
null and deleted points
Null and Deleted Points
  • Null points are points with no data that are still counted in the number of sample points
    • Type “.N” in the species field
  • Deleted points are points that are not counted in the number of sample points and not used in calculations even though they may contain data.
    • Type “.D” in the species field
entering tree data log heights
Entering Tree Data: Log Heights
  • When entering log heights in the Tree Data table, Two Dog assumes a decimal point when it calculates the results
    • Ex. 15 is treated as 1.5 logs
  • Two Dog automatically adds a zero to single digits added
    • Ex. Entering 2 will become 20 on the screen and is equal to 2.0 logs
checking and validating tree data
Checking and Validating Tree Data
  • Office Dog will not allow you to enter invalid data into the Tree Data table
    • Any invalid data entered will be cleared and a message explaining the problem will be displayed in the message box
  • Checking a point for missing data:
    • On the Tree Data tab select “Check”
    • Office Dog checks the data for the current point against the method requirements
    • Lists any problems in the message box
changing points and stands
Changing Points and Stands
  • From the Point Data window you can move to any desired point, change the stand number for a given point, and change the method for a given point
  • Use the scroll bar at the bottom of the window to move between points
  • To add a new point select Add
    • New points are numbered sequentially, you can accept or enter any integer not already in use
changing points and stands1
Changing Points and Stands
  • When Office Dog creates a new point, it assigns it to the current stand
  • To change stands:
    • Select the appropriate stand from the Stand Number dropdown list
    • Select Yes in the dialog box to confirm the change
selecting and changing methods
Selecting and Changing Methods
  • To change methods on any given point, select the appropriate method from the Method Number list
    • Select OK to confirm the change
    • Office Dog uses the new method for all subsequent points (until you select a new method)
  • If you change methods for a point that already has data recorded, the Inventory Method, EF/BAF, Height Units, and all product limits must be identicalor your calculated results will be wrong.
  • Fields not included in new methods will not appear but any data will still be saved and reappear if the methods are changed back
calculating reports
Calculating Reports

From the Reports Menu, select Calculate

Choose the appropriate calculation options by checking the boxes located in the calculate window

calculating reports1
Calculating Reports

Two Dog stores calculated results in a Microsoft Access data file (..\tdw20\Jobs\jobname.job\output.mdb)

Editing the *mdb file directly may prevent Two Dog from reading it correctly

generating reports
Generating Reports

You can review reports for the current job only

After calculating reports, select Print Reports from the Reports menu to open the Reports window

Check the box beside all stands you want to include in the report

Under “Select Reports to Print” choose desired reports to generate by checking the boxes located in the folders (double-click to open)

Choose whole stand or per acre to control how results are reported

generating reports2
Generating Reports
  • Choose “Print to screen first” to view reports on screen or print without viewing using “Print directly to printer” and click “Print selected reports”
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