Error(s) in re-building vignettes:
--- re-building ‘mapmisc.Rnw’ using knitr
--- finished re-building ‘mapmisc.Rnw’

--- re-building ‘north.Rmd’ using docco_linear
trying URL 'http://tile.openstreetmap.org/3/1/0.png'
Content type 'image/png' length 957 bytes
==================================================
downloaded 957 bytes

trying URL 'http://tile.openstreetmap.org/3/1/1.png'
Content type 'image/png' length 9434 bytes
==================================================
downloaded 9434 bytes

trying URL 'http://tile.openstreetmap.org/3/2/0.png'
Content type 'image/png' length 5176 bytes
==================================================
downloaded 5176 bytes

trying URL 'http://tile.openstreetmap.org/3/2/1.png'
Content type 'image/png' length 8332 bytes
==================================================
downloaded 8332 bytes

trying URL 'http://tile.openstreetmap.org/3/3/0.png'
Content type 'image/png' length 3589 bytes
==================================================
downloaded 3589 bytes

trying URL 'http://tile.openstreetmap.org/3/3/1.png'
Content type 'image/png' length 4376 bytes
==================================================
downloaded 4376 bytes

trying URL 'https://a.tile.opentopomap.org/13/2583/805.png'
Content type 'image/png' length 7232 bytes
==================================================
downloaded 7232 bytes

trying URL 'https://a.tile.opentopomap.org/13/2583/806.png'
Content type 'image/png' length 46490 bytes (45 KB)
==================================================
downloaded 45 KB

trying URL 'https://a.tile.opentopomap.org/13/2583/807.png'
Content type 'image/png' length 14480 bytes (14 KB)
==================================================
downloaded 14 KB

trying URL 'https://a.tile.opentopomap.org/13/2584/805.png'
Content type 'image/png' length 2284 bytes
==================================================
downloaded 2284 bytes

trying URL 'https://a.tile.opentopomap.org/13/2584/806.png'
Content type 'image/png' length 24894 bytes (24 KB)
==================================================
downloaded 24 KB

trying URL 'https://a.tile.opentopomap.org/13/2584/807.png'
Content type 'image/png' length 9874 bytes
==================================================
downloaded 9874 bytes

trying URL 'https://a.tile.opentopomap.org/4/4/1.png'
Content type 'image/png' length 48157 bytes (47 KB)
==================================================
downloaded 47 KB

trying URL 'https://a.tile.opentopomap.org/4/4/2.png'
Content type 'image/png' length 31042 bytes (30 KB)
==================================================
downloaded 30 KB

trying URL 'http://tile.openstreetmap.org/3/0/5.png'
Content type 'image/png' length 103 bytes
==================================================
downloaded 103 bytes

trying URL 'http://tile.openstreetmap.org/3/7/4.png'
Content type 'image/png' length 6097 bytes
==================================================
downloaded 6097 bytes

trying URL 'http://tile.openstreetmap.org/3/7/5.png'
Content type 'image/png' length 1927 bytes
==================================================
downloaded 1927 bytes

trying URL 'http://tile.openstreetmap.org/19/522518/345800.png'
Content type 'image/png' length 3157 bytes
==================================================
downloaded 3157 bytes

trying URL 'http://tile.openstreetmap.org/19/522518/345801.png'
Content type 'image/png' length 2334 bytes
==================================================
downloaded 2334 bytes

trying URL 'http://tile.openstreetmap.org/19/522519/345800.png'
Content type 'image/png' length 1427 bytes
==================================================
downloaded 1427 bytes

trying URL 'http://tile.openstreetmap.org/19/522519/345801.png'
Content type 'image/png' length 1489 bytes
==================================================
downloaded 1489 bytes

--- finished re-building ‘north.Rmd’

--- re-building ‘perspective.Rmd’ using docco_linear

Quitting from lines  at lines 120-125 [projOverDatelineNorth] (perspective.Rmd)
Error: processing vignette 'perspective.Rmd' failed with diagnostics:
unable to find an inherited method for function 'values' for signature 'x = "try-error"'
--- failed re-building ‘perspective.Rmd’

echo $(R --slave -e 'cat(tools::find_gs_cmd())')
/usr/local/bin/gs
rm -rf *.md *.tex *.toc *.bbl *.blg *.aux *.out *.log *.spl *tikzDictionary *.md figure/ cache/ *.dvi *.4* *.css *.idv *.lg *.tmp *.xref *.gz my*.bib *.nav *.xml *.vrb *.snm 
SUMMARY: processing the following file failed:
  ‘perspective.Rmd’

Error: Vignette re-building failed.
Execution halted