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Maptitude P&E Tech Corner

I am using my own streets layer (or a modified version of the one that came with MTPE).  How can I get the Legal Description report to use that data?

The Legal Description report requires that the precinct layer and two additional layers, CCCNTYT.CDF and CCTGRLN.CDF, are on your map.  The TIGER/Line file (CCTGRLN.CDF) that we distribute is basically the master file of all census geography.  It contains not only street features, but also railroads, rivers, and other census geography (some of which can be delineated by non physical features - i.e. school district boundaries).

It is easy to create your own TIGER/Line database using special tools included with MTPE. There are three stages to this process:

1. Create a TIGER/Line database
2. Choose Redistricting-Plan Utilities-Create TIGER/Line DB.
3. Type in the name TIGER, browse to a location where you would like to save your new file, and click Save.

MTPE will create a new geographic file named TIGER.DBD that contains many data fields, but no geography.

Populate the new TIGER/Line database with features

1. Create a new map which contains your streets file and the TIGER/Line database created above.
2. Change the working layer to TIGER/Line Segment.
3. Choose Tools-Map Editing-Copy & Paste Segments.  The Source should be Streets and the Target should be TIGER/Line Segment. Click OK.

4. Fill in the Source field for each Target field according to the table below. Your field names may be somewhat different if you are using your own data.

Target Field	Source Field
CFCC	CLASS
FENAME	NAME
FRADDL	[START LEFT]
TOADDL	[END LEFT]
FRADDR	[START RIGHT]
TOADDR	[END RIGHT]
ZIPL	[LEFT ZIP]
ZIPR	[RIGHT ZIP]

Change the Snap tolerance to 1 pixel and check the boxes to Allow snapping to a nearby segment and Allow creation of new endpoints. Click OK when finished.

5. Click the Select Source Segments tool (far left) in the Copy & Paste Segments toolbox. Find a street segment that is on the edge your streets. You will need to remember the location of this segment in the next steps.
6. Click the Find Target Placement tool (yellow light) in the Copy & Paste Segments toolbox.
7. Click the Paste New Segments tool (green light) in the Copy & Paste Segments toolbox. This adds the selected street to the new TIGER/Line database you created earlier.
8. Close the Copy & Paste Segments toolbox.
9. Change the working layer to Streets.
10. Click the Select by Pointing tool in the Tools toolbox. Drag a box around the entire extent of streets in the streets layer. You can check to see that you got all of the streets by choosing Selection-Settings and checking that Layer: Streets and Selection contain the same number of records. Click Close when you are done.

11. Deselect the street you added to the TIGER/Line layer in step 5 above by holding the Ctrl key on your keyboard and clicking on the segment with the Select by Pointing tool still activated. You can check to see that you deselected the street by choosing Selection-Settings and checking that Selection contains one less record than Layer: Streets. Click Close when you are done.
12. Change the working layer to TIGER/Line Segment.
13. Choose Tools-Geographic Utilities-Merge Geography. Match your settings to the picture below.

14. Click the Attributes tab. Fill in the Other layer field for each Working layer field according to the table below.

Working Layer Field	Other Layer Field
CFCC	CLASS
FENAME	NAME
FRADDL	[START LEFT]
TOADDL	[END LEFT]
FRADDR	[START RIGHT]
TOADDR	[END RIGHT]
ZIPL	[LEFT ZIP]
ZIPR	[RIGHT ZIP]

Click OK when finished.

15. Name the new geographic file TIGER2. Click Save. A new standard geographic file that contains all of your streets and the contents of the TIGER/Line layer is created.

You merge additional layers into the new TIGER/Line layer using the same methods as above into you have created a TIGER/Line Segment layer that contains the necessary features for your Legal Description report.

Export the TIGER/Line database to a compact geographic file

The TIGER/Line Segment layer must be a compact geographic file to be used by the Legal Description report. You can export your TIGER/Line Segment layer to a compact geographic file (CDF) using Tools-Export. The new file should be named CCTGRLN.CDF file and saved in a location where MTPE can write to it.

 

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