Set zoom level with a google_map object using the add_markers()

[nbarsch]

It states in the documentation "The map will automatically set the location and
zoom if markers are supplied through add_markers".

Is there a way to override the zoom level to a farther out zoom?

Reason behind this: I'd like to initially map just one coordinate, in shiny, but set the zoom level much farther out than the auto zoom to show the map around that one coordinate. I.e. ideally it would function as below (which in current syntax still gives me the close up on the one coordinate, from df gpscoords2 cols lat/lon).

  output$map <- renderGoogle_map({
    google_map(key = api_key, data=gpscoords2, zoom=15) %>%
      add_markers()
  })

[SymbolixAU]

@nbarsch Set the update_map_view argument to FALSE.

See the difference between

google_map(zoom = 3) %>% 
  add_markers(data = tram_stops)

google_map(zoom = 3) %>% 
  add_markers(data = tram_stops, update_map_view = FALSE)

[nbarsch]

Thanks for this! I got it to work. Did you guys just add this? Just as an FYI I tried this from the CRAN version (installed about a month or so ago) and kept running into unused argument: update_map_view. Figured it was added in the dev version so uninstalled and grabbed the dev version (install_github) and it worked fine. Not sure if I had an old CRAN version or not, looks like I probably did since the CRAN documentation is dated feb 1 (after I installed the CRAN version I had). Again, thanks for a pretty great package.

[SymbolixAU]

@nbarsch My latest release to CRAN was version 2.4.0 last week, so yours was probably out of date. And yes, the update_map_view argument was added in 2.4

Glad you're finding it useful. It's good to see people getting use out of it. And, if you come across any other suggestions feel free to ask!

[tnelsen]

I need to be able to update where the map is centered without updating the zoom level of an already rendered map. Right now the only way that seems possible is by re-rending the map? Is there a way to center the map view around a new marker but keep the current zoom level? Also, similar to #230

[dcooley]

I've just pushed an update to the master branch with a function google_map_view(), which lets you set the view's location.

e.g.

google_map() %>% 
  add_markers(data = tram_stops, update_map_view = FALSE) %>% 
  google_map_view(location = c(52.5, 0.1), zoom = 6)

I haven't fully decided on the function name or functionality yet, but let me know if this is what you're looking for.

[tnelsen]

That's what I was looking for, thanks!

[kaheil]

I just tested this as follows, and it does not work:

  google_map_update(map_id = ns("srGoogleMap"),data=gAco) %>%
      googleway::google_map_view(location = as.numeric(gAco), zoom = 13) %>% 
       googleway::clear_markers() %>%
       googleway::add_markers(lat="lat",lon ="lng")

[dcooley]

@kaheil what specifically does not work?

when you call the add_markers() function it will auto-zoom to the makers, unless you specify update_map_view = FALSE

[kaheil]

For me, the first marker (let's say a house in Massachusetts) I add, the map will zoom to it, then I clear markers, then I add a second marker (let's say a house in California), the map will not zoom to that house, but will be on a zoom and extent that shows the first marker and the second (even though the markers were cleared). The map seems to remember the markers even if they are cleared

[dcooley]

Moving to a new isssue #251