[R-sig-Geo] Combine line segments into one line

[Remon Hanna]

Hi

I have line segments that I would like to combine them within each corridor, I.e each corridor will be one line of combined segments of NAME_S2S and combined geometry  as per the screenshot.

I have managed to plot the segments on the map as you can see but when zooming in these segments are not in one, which I would like to group them.

I ran the below line to group them by corridor, but I get error below;

> dataformap1<-gLineMerge(dataformap[dataformap$Corridor==1, ])
Error in gLineMerge(dataformap[dataformap$Corridor == 1, ]) :
  Invalid geometry, may only be applied to lines

Many thanks in advance

Remon Hanna

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