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SNAP overview
SNAP programs
snap_manager - environment for running adjustments
snap_manager scripting
snap_manager scripting user interface components
snap_manager scripting system functions and variables
Regular expression syntax
SNAP - network adjustment program
Basic adjustment procedure
Creating input files
Reviewing adjustment results
Common problems in SNAP adjustments
The adjustment does not converge
Format errors in the input files
The adjustment fails with a singularity
There is not enough memory for the program.
Snapplot - graphical view of adjustments
Starting snapplot
Snapplot configuration
Snapplot configuration commands
Snapplot commands in the command file
The map window
The key
The stations list
The observations list
The details window
Dialog boxes
The highlight stations dialog
The hide stations dialog
The find station dialog
The observation display options dialog
The highlight observations dialog
The observation listing options dialog
The error options dialog
The standardised residuals colours dialog
The redundancy colours dialog
Background graphics
Dat2site - calculate trial coordinates
Example of dat2site
Snapconv - changing coordinate systems
Snapgeoid - Calculate geoid heights
site2gps - calculate dummy GPS data files
Snapmerge - merging coordinate files
Snapspec - calculate coordinate orders
Snapspec order calculation algorithm
Snapspec configuration file
snaplist - list adjustment results
concord - coordinate conversion program
Concord error messages
Examples of concord
Command files
Configuration files
CSV format definition files
Command file syntax
Adjustment mode
Using stations in adjustments
Station lists
Additional adjustment parameters
Additional parameter commands
Defining the residual listing format
Summary of commands by function
Alphabetical list of commands
accept
add_residual_column
bearing_orientation_error
classification
configuration
convergence_tolerance
coordinate_file
coordinate_precision
data_file
default_refraction_coefficient
define_residual_format
deformation
error_type
file_location_frequency
fix
flag_significance
float
free
geoid
gps_antenna_height
gps_vertical
horizontal_float_error
ignore
ignore_missing_stations
include
list
magic_number
max_adjustment
max_iterations
mde_power
min_iterations
mode
number_of_worst_residuals
output
output_csv
output_precision
plot
print
proj_bearing_use_datum
recode
redundancy_flag_level
reference_frame
reference_frame_scale_error
refraction_coefficient
reject
reorder_stations
set_observation_option
sort_observations
spec_test_options
specification
station_code_width
station_offset_file
summarize_errors_by
systematic_error
test_specification
title
topocentre
use_distance_ratios
vertical_float_error
Station coordinate file
Station codes
SNAP Station coordinate file format
CSV format station coordinate files
Examples of station coordinate files
Station offset file format
Station recode file
Observation files
Data types
Azimuth observations (AZ)
Distance ratio observations (DR)
Distance observations (SD, HD, ED)
GPS observations (GB or GPS)
Point coordinate observations (GX)
Height difference observations (LV)
Orthometric and ellipsoidal height observations (OH, EH)
Horizontal angle observations (HA)
Latitude and longitude observations (LT, LN)
Projection bearing observations (PB)
Refraction coefficients
Zenith distance observations (ZD)
Rejecting observations
Observation attributes
Observation classifications
Example of data classification
Bearing orientation errors
Distance scale errors
GPS reference frames
Reference frame scale error
User defined systematic errors
SNAP observation file format
Line observation format
Grouped observation format
Grouped observations with covariance format
Point observation format
GPS error formats
Point coordinate error formats
Angle observation errors
Latitude and longitude observation errors
Orthometric and ellipsoidal height errors
Data definition commands by function
Data definition commands alphabetically
The #bearing_orientation_error command
The #classification command
The #classify command
The #data command
The #date command
The #distance_scale_error command
The #ds_error command
The #gps_enu_error command
The #gps_error_type command
The #gx_enu_error command
The #hp_angles, #deg_angles, and #dms_angles commands
The #lv_error command
The #note command
The #projection command
The #refraction_coefficient command
The #reference_frame command
The #time command
Troubleshooting data file errors
Example data file
CSV observation file format
SINEX observation files
Coordinate systems in SNAP
What is a coordinate system
Coordinate system file format
Ellipsoid definition format
Reference frame definition format
Coordinate system definition format
Equatorial Mercator projection definition format
Gnomic projection definition format
Lambert Conformal Conic projection definition
New Zealand Map Grid definition format
Polar Stereographic projection definition format
Transverse Mercator projection definition format
Coordinate system notes format
Standard coordinate systems provided with concord
Geoid grid files
Grid file format
LINZ deformation model
LINZ deformation file format
Triangulated data file format
Adjustment strategies
Minimum constraints adjustment to find gross errors
Improving estimates of observation errors
Fitting existing control
Adjusting GPS surveys
Handling eccentric stations
Network preanalysis
Vertical adjustments
Testing accuracy specifications
Files used by SNAP
Change log