[R-sig-Geo] trend analyis/spatial modeling

[Hodgess, Erin]

Hello Moshood:

I am probably oversimplifying, but I think if you just do:  krige(yield~easting+northing)
You should be ok.

Thanks,
Erin


-----Original Message-----
From: r-sig-geo-bounces at r-project.org [mailto:r-sig-geo-bounces at r-project.org] On Behalf Of Moshood Agba Bakare
Sent: Tuesday, June 18, 2013 4:53 PM
To: r-sig-geo at r-project.org
Subject: [R-sig-Geo] trend analyis/spatial modeling

Dear All,
I intend to fit spatial covariance structure to yield response georeferenced with geographical coordinates (latitude and longitude) using the model
Z(s) =u(s) +e(s). I have converted to projected coordinates i.e. easting and northing in meters.
I would like to find out if it is necessary to carry out trend surface analysis by regressing the yield on the coordinates before proceeding with fitting the spatial covariance models.
That is yield ~easting + northing

Thank you while looking forward to your response.

Best regards
Moshood

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