Density Surface Modelling of Distance Sampling Data
Find the block information
Check column names exist
Data format for DSM
Density surface modelling
Check for autocorrelation in residuals
Fit a density surface model to segment-specific estimates of abundance...
Prediction variance estimation assuming independence
Variance estimation via parametric moving block bootstrap
Prediction variance propagation for DSMs
Check for autocorrelation in residuals
Prediction variance estimation assuming independence
Variance estimation via parametric moving block bootstrap
Prediction variance propagation for DSMs
Variance propagation for density surface models
Detection function objects when detection is certain
Generate data from a fitted detection function
Moving block bootstrap sampler
Convert latitude and longitude to Northings and Eastings
Create a knot grid for the internal part of a soap film smoother.
Observed versus expected diagnostics for fitted DSMs
Plot a density surface model.
Create plots of abundance uncertainty
Spatially plot predictions per model term
Predict from a fitted density surface model
Prediction for fake detection functions
Print a description of a density surface model object
Print a description of a density surface model variance object
Print a description of a density surface model variance object
Print summary of density surface model variance object
Print summary of density surface model variance object
Randomised quantile residuals check plot for GAMs/DSMs
Randomised quantile residuals check plot for GAMs/DSMs
Summarize a fitted density surface model
Summarize the variance of a density surface model
Summarize the variance of a density surface model
Trimmed variance
Visualise concurvity between terms in a GAM
Visualise concurvity between terms in a GAM
Density surface modelling of line transect data. A Generalized Additive Model-based approach is used to calculate spatially-explicit estimates of animal abundance from distance sampling (also presence/absence and strip transect) data. Several utility functions are provided for model checking, plotting and variance estimation.
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