get_imap_data: Get data from Maryland iMap
In elipousson/mapmaryland: Easy Access to Maryland Spatial Data

get_imap_data

R Documentation

Get data from Maryland iMap

Description

Get data from Maryland iMap including Computer Assisted Mass Appraisal (CAMA), parcel data, Maryland Inventory of Historic Properties data, and a variety of water data.

Usage

get_imap_data(
  location = NULL,
  nm = NULL,
  crs = getOption("mapmaryland.crs", default = 3857),
  ...
)

get_cama_data(
  location,
  type = "core",
  crs = getOption("mapmaryland.crs", default = 3857),
  ...
)

get_parcel_data(
  location,
  type = "boundaries",
  crs = getOption("mapmaryland.crs", default = 3857),
  block = FALSE,
  ...
)

format_parcel_data(
  data,
  imap_addr_cols = list(bldg_num = "strtnum", street_dir_prefix = "strtdir", street_name
    = "strtnam", street_suffix = "strttyp")
)

get_mht_data(
  location,
  type = "mihp",
  crs = getOption("mapmaryland.crs", default = 3857),
  ...
)

get_water_data(
  location,
  type = "streams",
  crs = getOption("mapmaryland.crs", default = 3857),
  ...
)

get_imap_url(nm = NULL)

Arguments

`location`	A `sf`, `sfc`, or `bbox` object (or other object convertible with `sfext::as_bbox()`. Required.
`nm`	Layer name identifier used to retrieve url from `md_imap_index` based on the snakecase "nm" column; Default: `NULL`.
`crs`	Coordinate reference system to return. Defaults to `getOption("mapmaryland.crs", default = 3857)`.
`...`	Additional parameters passed to `getdata::get_esri_data()`
`type`	Default and supported options vary by function. See details.
`block`	If block is `TRUE`, pass parcel data to `getdata::bind_block_col()`. Defaults to `FALSE`.
`data`	Data to pass to `getdata::bind_block_col()`. `format_parcel_data()` only.
`imap_addr_cols`	Named list with address column names for input data. Passed to corresponding parameters in `getdata::bind_block_col()`

Details

Options for type parameter:

get_cama_data(): Default: "core"; options: "bldg" (detailed building characteristics), "core", "land", "subarea" (building subarea).
get_water_data(): Default: "streams", options: "streams" (Rivers and streams generalized), "streams detailed" (Rivers and streams generalized), "federal watersheds", "8 digit watersheds", "12 digit watersheds", "navigable waterways", "ponds" (Lakes and ponds)
get_parcel_data(): Default "boundaries", options: "boundaries" (Parcel boundaries), "points" (Parcel points)
get_mht_data(): Default: "mihp"; options: "mihp" (Maryland Inventory of Historic Properties), "nr" (National Register of Historic Places), "easements" (Preservation Easements held by the Maryland Historical Trust)

Helper functions:

format_parcel_data() is a wrapper for getdata::bind_block_col() used by get_parcel_data()
get_imap_url() is a look-up function for the md_imap_index using the short "nm" column as a index.