Examples

• Basic Usage Examples
  • Example 1: Compute Helmert anomalies from Python
  • Example 2: Compute a residual geoid from a gridded anomaly field
  • Example 3: Convert geoid values between tide systems
  • Example 4: Normalize a survey table before running the workflow

Basic Examples

Here are some basic examples of using GeoidLab. For more detailed walkthroughs, see the tutorial repository.

Gravity Reduction

geoidlab reduce --input-file gravity.csv --model EGM2008 \
                --do helmert --grid \
                --grid-size 1 --grid-unit minutes \
                --bbox -5 5 -5 5 --grid-method kriging

Residual Geoid Computation

geoidlab geoid --input-file surface_gravity.csv --model EGM2008 \
               --bbox -5 5 -5 5 --grid-size 5 --grid-unit minutes \
               --method hg --sph-cap 1.0 --max-deg 2190

Tide System Conversion

geoidlab geoid --target-tide-system tide_free \
               --gravity-tide mean_tide

Survey Table Preparation

geoidlab prep --input-file raw_gravity.xlsx --output-file surface_gravity.csv \
              --platform terrestrial --data-type gravity --tide-system mean_tide

See the individual example page for more detailed explanations and use cases.