TR: Splitting the transect in to smaller segments

I am sorry for the distortion. Here is the original data which consists of spatial point (Long-Lat) representing the beginning position of each transect of length 20km. Now I want to split each transect in to multiple 3km segments and test for spatial auto correlation. 

Obs	    Lat	                   Long              Number 
1	12,80382	82,44553	56
2	12,77357	82,67792	1
3	12,74253	82,8775	0
4	12,7118	83,08733	0
5	12,68468	83,28215	90
6	12,64768	83,49067	31
7	12,61173	83,723	                0
8	12,58148	83,92935	0
9	12,553	                84,16293            91
10	12,51517	84,37533	0
11	12,48025	84,60193	0
12	12,45202	84,83365	1
13	12,03108	87,61216	3
14	11,99813	87,83575	0
15	11,96863	88,05197	0
16	11,93698	88,27583	130
17	11,90938	88,49937	0
18	11,87682	88,69888	0
19	11,8452	88,90217	127
20	11,8116	89,13405	0
21	11,77802	89,35748	1
22	11,74482	89,57783	0
23	11,70103	89,94217	0
24	11,32148	92,42758	0
25	11,33478	92,68475	0
26	11,51452	92,78533	0

rm(list=ls())
# Library to load
library(sp)
library(adehabitat)
library(adehabitatHR)
library(adehabitatHS)
library(adehabitatLT)
library(adehabitatMA)
library(rgdal)
library(fields)
library(shapefiles)
library(maptools)
library(rgdal)
library(gpclib)
gpclibPermit()

setwd("C:\\Users\\mondreti\\Desktop\\Rworkdir")

# Data to load
BOBMDSOTE<- read.csv("C:\\Users\\mondreti\\Desktop\\Rworkdir\\BOBMD_SOTE1.csv", sep= ";", header=T)

# Inspect column headings
head(BOBMDSOTE)

# Telling R that BOBMDSOTE data frame consists spatial data	
coordinates(BOBMDSOTE)<- c("Latitude", "Longitude")
Class(BOBMDSOTE)
str(BOBMDSOTE)
x<- BOBMDSOTE$Latitude
y<- BOBMDSOTE$Longitude

xy.spdf <- SpatialPointsDataFrame(xy.sp, BOBMDSOTE)
summary(xy.spdf)
dimensions(xy.spdf)
xy.spdf

-------------------
After this I am unable to proceed.  Please help me with the code.

Thanks in advance,
Ravi.


-----Message d'origine-----
De?: Michael Sumner [mailto:mdsumner at gmail.com] Envoy??: mardi 30 juillet 2013 11:47 ??: Ravichandra MONDRETI Cc?: r-sig-geo at r-project.org Objet?: Re: [R-sig-Geo] Splitting the transect in to smaller segments

Could you put your data together in a reproducible way? It looks like this might just be the raw contents of a text file?

If you have it in R use dput() to create the code that will regenerate your object.

Hello All,

My data are counts of seabirds and marine mammals at a spatial scale of 20 Km i.e I had recorded the position of the ship at the beginning of every 20 Km transect. Now I want to split each 20km transect in to 3km segments to check for spatial autocorrelation among the observations and relate it to the oceanographic features. I had tried with packages sp and rgdal but was not arrive at the r code. Could anyone suggest me how to proceed with this problem?

My data looks like this:

    Latitude

        Longitude

12,80382

82,44553

12,77357

82,67792

12,74253

82,8775

12,7118

83,08733

12,68468

83,28215

12,64768

83,49067

12,61173

83,723

12,58148

83,92935

12,553

84,16293

12,51517

84,37533

12,48025

84,60193

12,45202

84,83365

12,03108

87,61216

11,99813

87,83575

11,96863

88,05197

11,93698

88,27583

11,90938

88,49937

11,87682

88,69888


Thanks in advance,
Ravichandra Mondreti.


Ravichandra Mondreti
PhD student/ Doctorant
MAHEVA Fellow (ERASMUS MUNDUS programme) Spatial Population Ecology 
Team CEFE-CNRS 1919, route de Mende
F-34293 Montpellier Cedex 05
France




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Michael Sumner
Hobart, Australia
e-mail: mdsumner at gmail.com