User's Guide

FLIGHT

plot NAPP flight lines

Function:

Generates flight lines for plotting on 1:250,000 or 1:100,000 scale maps. Flight lines are series of points indicating a plane's position over terrain at the time an aerial photograph should be taken.

Parameters:

MAPSPC
Map specification (LAT,LON,LATDIST,LONDIST). This specifies the map's location and size. The first value given is the latitude of the south side of the map, followed by the longitude (no minus sign) of the west side of the map. The latitude height of the map and longitude length of the map are then given. All coordinates are entered in decimal degrees.

WINDOW
Window specification (LAT,LON,LATDIST,LONDIST). This specifies the flight line's location and size. The first value given is the latitude of the south side of the flight line, followed by the longitude (no minus sign) of the west side of the flight line. The latitude height of the flight line and longitude length of the flight line are then given. All coordinates are entered in decimal degrees. If zeros are entered processing will be terminated.

MAPNAME
Map name. This is the name of the plot file.

SCALE(250000)
Map scale. This is the scale of the map.

EXAMPLES:

  1. TAE> flightln mapspc=(41.0 84.0 1.0 2.0), window=(41.0 84.0 1.0 2.0), mapname=toledo, scale=250000

        TAE-FLIGHTLN> WINDOW=(0.0 0.0 0.0 0.0)
    

    A 1:250,000 scale flight line plot, 1 degree high by 2 degrees wide, will be generated for a map that is 1 degree high by 2 degrees wide with its southwest corner at 41 degrees latitude, -84 degrees longitude. It will be stored in file TOLEDO.PLT.

  2. TAE> flightln mapspc=(39.0 124.0 1.0 2.0), window=(39.0 124.0 .5 1.0), mapname=ukiah, scale=250000

        TAE-FLIGHTLN> WINDOW=(39.5 123.5 .5 1.0)
        TAE-FLIGHTLN> WINDOW=(0.0 0.0 0.0 0.0)
    

    A 1:250,000 scale flight line plot, 30 minutes high by 1 degree wide, will be generated for a map with its southwest corner at 39 degrees latitude, -124 degrees longitude. It will be stored in file UKIAH.PLT. UKIAH.PLT will contain corner tics and vertical and horizontal labeling for the map in plot 1, and flight lines in plot 2. A second set of flight lines for the map will be in plot 3.

  3. TAE> flightln mapspc=(45.0 124.0 2.0 1.0), window=(45.0 124.0 .5 1.0), mapname=oregon city, scale=250000

        TAE-FLIGHTLN> WINDOW=(46.0  124.0 .25 1.0), +
        TAE-FLIGHTLN> WINDOW=(46.75 124.0 .25 1.0), +
        TAE-FLIGHTLN> WINDOW=(0.0 0.0 0.0 0.0)
    

    1:250,000 scale flight line plots will be generated for a map with its southwest corner at 45 degrees latitude, -124 degrees longitude. The first flight line will start at the south end of the map and extend 30 minutes high by 1 degree wide. The second flight line will start in the vertical center of the map and extend 15 minutes high by 1 degree wide. The third flight line will extend from the north end of the map down 15 minutes and will be one degree wide also. They will be stored in file OREGON.PLT.

DESCRIPTION/ALGORITHM:

The program reads the parameters. The plot file is opened and initialized. The projection and transformation are determined. The corner tics and horizontal labels are written to the plot file. Flight lines are then written to the plot file and the user is prompted for a new flight line specification. If no more flight lines are needed enter (0.0 0.0 0.0 0.0). When all flight lines for a map have been written, processing ends.

NONFATAL ERRORS:

    None.

FATAL ERRORS:

  1. [flightln-conv] Coordinate conversion error coordinates: <xxxxxxxxx> <xxxxxxxxx>

    An error occurred when attempting to transform from geographic coordinates to UTM coordinates.

  2. [flightln-lat] Flight line latitude exceeds map boundaries

    The flight line latitude range does not fit within the map's boundaries. Check the data and correct it.

  3. [flightln-lon] Flight line longitude exceeds map boundaries

    The flight line longitude range does not fit within the map's boundaries. Check the data and correct it.

USERNOTES:

    None.