The SNAP package comprises a number of programs for various managing various aspects of survey adjustment. The can be run individually from a DOS command line, or accessed using the snap manager program.
The programs can be categorised as follows:
Data preparation |
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| dat2site | Calculates approximate trial coordinates for stations based upon observations to them. |
| snapgeoid | Adds geoid height information to a coordinate file using a gridded geoid model. |
| snapconv | Converts a coordinate file between different coordinate systems. |
| snapmerge | Merges two coordinate files |
| site2gps | Generates a dummy GPS data file from a coordinate file for network accuracy analysis of a proposed survey. |
Adjustment and analysis |
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| snap | Calculates new coordinates for stations using a least squares adjustment of observations. |
| snapplot | Graphical tool for viewing and analysing adjustment results. |
Reporting |
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| snapspec | Assigns coordinate orders to calculated coordinates using specifications in terms of absolute and relative accuracies. |
| snaplist | Generates text reports of adjustment results. |
Other utilities |
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| concord | Converts coordinates between different coordinate systems |