Tag Archives: SurvCE

Carlson’s .CRDB Format Notes

The Carlson .CRD format has been around for a long time and it is fairly well documented.

The .CRDB format was released around version 5.04, but really become dependable and useful with the release of 5.06 in August 2017. The ‘new’ .CRDB format expands the size of the point name from 9-characters and the size of the point description from 31-characters to 255 characters each.

If you change the extension of the .CRDB file from .CRDB to .SQLite, then you can use any standard SQLite client (like ‘DB Browser’: https://sqlitebrowser.org/dl/#windows ) to view the structure:

The structure of a .CRDB (aka .SQLite) file.

and the contents:

Typical contents of a .CRDB file.

I am not sure if point names longer than 9 characters are a good thing and I personally have preferred 4-character point names in the range 0000 to 9999 for years, but I guess I understand STK1024, but extending the descriptions to 255 characters is certainly welcome.

There are also a lot of open source SQLite clients that make reading, writing, sorting, searching, record deletion, db compressing and cleaning for SQLite files very dependable and fast.

I don’t think there any disadvantages to making .CRDB files other than very old versions of SurvCE won’t be able to open them and many 3rd party tools are not .CRDB aware.

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SurvCE ‘Clean Install’ alongside ‘Existing Install’

We feel that it is best when doing updates to SurvCE to do a ‘Clean Install’.

For example, if updating from SurvCE version 6.03 to 6.08, there have been several new options, new functions and major revisions to SurvCE. While it is possible to install 6.08 over the top of 6.03, we believe that it can be troublesome and lead to undefined option values.

There may be an advantage to keeping the old installation fully intact in case of problems, you can quickly revert back to the previous version.

This FAQ describes how I do a ‘Clean Install’: [ continue reading … ] preserving existing SurvCE activation.

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NAD27 UTM in “FAST Survey” and “SurvCE”

SurvCE (and FAST Survey) don’t have NAD27 UTM projections built-in. So if you are working with an older dataset (like Oil and Gas) you are going to need to enter a new projection manually.

Here is how to set up for NAD27 Zone 12:

Make a new job, be sure to select ‘Meters’ (unless you want US Survey Feet or International Feet.)

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Click on ‘Edit Projection List

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Press the ‘Add User Defined’ button.

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Configure to match as above. (You will need to adjust the C. Meridian to match your UTM Zone.) Then click the ‘New Datum’ button.

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Configure to match as above.

Click the ‘Green Check Mark’ four times to return to the main menu.

Let’s check our new projection:

Now click on ‘COGO, Calculator, Conversion and put the dot in LLH->Grid’

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Enter the lat and lon as shown above. If you entered everything correctly, then the computed Northing and Easting will be as shown.

You are now ‘Good To Go!’

M

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