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Map - points - Create leaflet html widget map of points using table with lat lon

Source: R/mapfast.R
mapfast.Rd

Map - points - Create leaflet html widget map of points using table with lat lon

Usage

mapfast(
  mydf,
  radius = 3,
  column_names = "all",
  labels = column_names,
  browse = FALSE,
  color = "#03F"
)

Arguments

mydf

Typically something like the output of ejamit()$results_bysite, but can also be the full output of ejamit() in which case this uses just the $results_bysite table, and in general mydf can be a data.frame or data.table that has a set of points or polygons or Census FIPS codes.

  1. point data defined by columns named lat and lon, or columns that latlon_infer() can infer to be that, as from sitepoints_from_any() or ejamit()$results_bysite

  2. polygon data in a spatial data.frame that has a geometry column of polygons, as from shapefile_from_any(), or

  3. Census units defined by FIPS codes in a column called "ejam_uniq_id" (not fips), where those fips are for States, Counties, Tracts, Blockgroups, or cities/towns/Census Designated Places (7 digits including any leading zeroes), e.g., as from names2fips('DE') or ejamit(fips='01')$results_bysite.

radius

in miles, converted to meters and passed to leaflet::addCircles()

column_names

If "ej" then nice popup made based on just key EJScreen indicators. If "all" then every column in the entire mydf table is shown in the popup. If a vector of colnames, only those are shown in popups.

labels

The labels used before the column_names, for map popups, like label: column_name (ignored if column_names is ej or all)

browse

optional logical, set to TRUE if you want the function to launch a default browser window to show the map and print the temp filepath and filename in the console. Normally the map would be shown in the default RStudio viewer pane.

color

color of circles or polygons

Value

plots a leaflet map with popups with all the columns from mydf, and returns html widget

See also

ejam2map() popup_from_any() mapfastej()

Examples

pts = testpoints_100
mapfast(pts)

# out = ejamit(pts, radius = 1)
out = testoutput_ejamit_100pts_1miles

# See in RStudio viewer pane
ejam2map(out)
mapfastej(out$results_bysite[c(12,31),])
if (FALSE) { # \dontrun{

# See in local browser instead
ejam2map(out, browse = T)

# Open folder where interactive map
#  .html file is saved, so you can share it:
x = ejam2map(out)
fname = map2browser(x)
# browseURL(dirname(fname)) # to open the temp folder
# file.copy(fname, "./map.html") # to copy map file to working directory

out <- testoutput_ejscreenapi_plus_5
mapfastej(out)
} # }