updated: 24-Mar-2011

 Copan for Windows

Field Files

Contents
  1. Field File Types
  2. Copan Field File Format
  1. Field Attribute Keys
  2. Remote Elevation Measurement

To Copan, field survey data consist of measured or reduced angles and distances, and come in field files. The field modules§ Field Data Processing, § Field Bearings Processing, and § Field Resections Processing — can read field files.

Note that coordinates — however they've been collected or derived — are not considered to be field data and can only be imported to Copan via the generic import facility (see § Import and Export). If coordinates are in a field file, they will be displayed as comments and will not processed.

1. Field File Types

Let us know ( at support@underhill.ca ) if you'd like Copan to read field data in other formats. Please note the software version and release date (see § Software Version) in all communications.

2. Copan Field File Format

3. Field Attribute Keys

Here are the currently recognized key words representing attributes in the attribute-key = value pairs. Note that correct case is important.
Attribute key Attribute meaning Ignored during calculation
atsetup (or occupied) point number
azazimuth (or bearing)
basbase point number for a REM point
codpoint (or feature) code
datdate *
DCdistance correction constant
DFdistance correction factor (related to PPM)
disdistance point number for a REM point
endprevious line is last leg of traverse or last shot of resection
FBfield book name or number *
HChorizontal circle reading (or direction)
HIheight of instrument
HSheight of signal (reflector, prism, or target)
instrinstrument name or number *
jobjob/project name or number *
notpoint note
pgsfield book pages *
refreference (or backsight) point number
SDslope distance
SF(combined) scale factor (i.e., projection and elevation factor)
svrsurveyor/operator name or number*
timtime *
totarget (or foresight) point number
UFunits conversion factor
VCvertical circle reading (or zenith angle)
VCCvertical circle correction

Let us know ( at support@underhill.ca ) if you'd like Copan to recognize other attributes. Please note the software version and release date (see § Software Version) in all communications.

4. Remote Elevation Measurement

A remote elevation measurement (or REM) is an indirect observation of height and position of a topographic point whose slope distance is unobservable. If you can observe a vertical angle to an otherwise inaccessible point (such as the top of a mast) and you cannot get a reflectorless slope distance, you can determine the 3D coords for that point indirectly, via another point that you can shoot to normally and that is either vertically below the inaccessible point or at the same horizontal distance away.

Let's call the high inaccessible point the REM point, an accessible point vertically below it a base point, or an accessible point at the same horizontal distance away a dist point. To insert a REM observation, reference must be made to either a base point or a dist point:

updated: 24-Mar-2011