segmentation in dsm

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Olga Lyashevska

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Oct 1, 2021, 11:34:18 AM10/1/21
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Hi all, 

I noticed that depending on segment size there are more or less 0's introduced to the dataset and I would like to fit a model using data as it is, i.e. with no segment size effect.

So I have 2 questions:

1. Can I fit dsm without segmenting data?
2. If not, can I make segment size equal to transect and in this way override its effect?

Many thanks for your help,
Olga

Eric R

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Oct 1, 2021, 1:29:56 PM10/1/21
to distance-sampling
Olga

Afraid you cannot fit a density surface model without segmenting.  The number of replicate transects would be too few to construct a model that provided much information about spatial distribution of organisms.  I suppose you could make segment length equal to transect length, but as I say, the number of data points for the spatial model would be very small and the spatial scale of the measured covariates would be inconsistent with the transect lengths.

Olga Lyashevska

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Oct 4, 2021, 4:55:30 PM10/4/21
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Thanks Eric, I appreciate that!
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