Hello Nick:

First: as Jeff pointed out, you'll probably have better luck posting to the r-sig-geo list.


On 21/10/2022 14:25, Nick Wray wrote:
Hello

I have managed to download and plot the outline for the River Tweed In the
Sottish borders)  catchment using this code.  21009 is a zipfile downloaded
from the FEH website https://fehweb.ceh.ac.uk/Map:

require(rgdal)

shape <- readOGR(dsn ="C:/Users/nick/Desktop/PhD Oct 22", layer = "21009")


Second: The R-spatial "ecosystem" has undergone some major changes recent years. You'd be well advised, I think, to switch to using the `sf` package for vector data. So reading in a shapefile would be `sf::st_read(dsn="...")`



Third: Regarding your other post about string representations of geometries. Can you be more specific as to what your final goal is? The "canonical" string representation of geometries is Well Known Text (WKT) and can be returned with the `sf::st_as_text()` function. Does that help?


Kind regards,

Micha


shape

plot(shape)

and I get an outline of the Tweed catchment which I can use

the zipfile has eight documents all with the name “21009.” and the suffixes
cpg/dbf/prj/sbn/sbx/shp/shp/shx   There are two .shp docs, one labelled as
SHP file and one as XML file.

However

I then have downloaded a file of a plot of all the rivers in the uk from
https://osdatahub.os.uk/downloads/open

I’ve put this data into a zipfile with the name “rivers”   Within this are
eight docs – four with the names HydroNode. and suffixes dbf/prj/shp/shx
and four with the name WatercourseLink. and the four suffixes.

Just subbing in “rivers” for “21009” in my code above doesn’t work and I
can’t find a way of getting into the shapefiles and opening them


I'd be grateful if anyone can help me get further with this

Thanks Nick Wray

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--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918

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