Title: Access the Felt API
Version: 0.1.0
Description: Upload, download, and edit internet maps with the Felt API (https://developers.felt.com/rest-api/getting-started). Allows users to create new maps, edit existing maps, and extract data. Provides tools for working with layers, which represent geographic data, and elements, which are interactive annotations. Spatial data accessed from the API is transformed to work with 'sf'.
License: MIT + file LICENSE
Encoding: UTF-8
RoxygenNote: 7.3.3
Imports: cli, curl, dplyr, fs, geojsonsf, httr2, jsonlite, purrr, rlang, sf, stringr, tibble, tidyr
URL: https://github.com/christopherkenny/feltr, https://christophertkenny.com/feltr/
Suggests: httptest2, testthat (≥ 3.0.0)
Config/testthat/edition: 3
Depends: R (≥ 4.1.0)
NeedsCompilation: no
Packaged: 2025-12-11 03:05:44 UTC; chris
Author: Christopher T. Kenny ORCID iD [aut, cre]
Maintainer: Christopher T. Kenny <ctkenny@proton.me>
Repository: CRAN
Date/Publication: 2025-12-11 16:20:02 UTC

feltr: Access the Felt API

Description

logo

Upload, download, and edit internet maps with the Felt API (https://developers.felt.com/rest-api/getting-started). Allows users to create new maps, edit existing maps, and extract data. Provides tools for working with layers, which represent geographic data, and elements, which are interactive annotations. Spatial data accessed from the API is transformed to work with 'sf'.

Author(s)

Maintainer: Christopher T. Kenny ctkenny@proton.me (ORCID)

See Also

Useful links:

Add layer to library

Description

Add layer to library

Usage

felt_add_library_layer(map_id, layer_id, name = NULL, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_id

character, layer identifier from url, from felt_get_map()

name

character, name to save the layer under. Optional.

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble if clean = TRUE, otherwise a list

Examples


felt_add_library_layer(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                      layer_id = '4Lc7RaEyRP2LfARGmR6e4C',
                      name = paste0('Test layer ', Sys.time()))

Add layer group to library

Description

Add layer group to library

Usage

felt_add_library_layer_group(map_id, layer_group_id, name = NULL, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_group_id

character, layer group identifier from url, from felt_get_map().

name

character, name to save the layer group under. Optional.

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble if clean = TRUE, otherwise a list

Examples


felt_add_library_layer_group(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                            layer_group_id = 'rHxyTef7S9CO8W7n1PvBVwC',
                            name = paste0('Test layer group ', Sys.time()))

Add Elements to Existing Map

Description

Add Elements to Existing Map

Usage

felt_add_map_elements(map_id, elements, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

elements

a sf::sf object or a path to a geojson file

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble with the elements added

Examples


elem <- felt_add_map_elements(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                    elements = fs::path_package('feltr',  'bbox.geojson'))
elem
# and delete layer
felt_delete_map_elements(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA', element_id = elem$felt_id)

Add Layers to Existing Map

Description

Add Layers to Existing Map

Usage

felt_add_map_layers(
  map_id,
  name = NULL,
  file_names = NULL,
  lat = NULL,
  lng = NULL,
  zoom = NULL,
  clean = TRUE
)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

name

Name of the layer. Required.

file_names

Files to include. Required.

lat

For images, the latitude of the center of the image. Optional.

lng

For images, the longitude of the center of the image. Optional.

zoom

For images, the zoom level of the image. Optional.

clean

logical, whether to turn the API response into a tibble::tibble

Value

status of the upload

Examples


layer <- felt_add_map_layers(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                    file_names = fs::path_package('feltr',  'towns.geojson'),
                    name = 'Towns  test')
layer

Add Layers to Existing Map from URL

Description

See Felt "Upload Anything" documentation for detailed examples of potential URLs.

Usage

felt_add_map_layers_url(map_id, url, name = NULL, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

url

Link to layer to include. Required

name

Name of the layer. Required.

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble for the created layer

Examples


# split the URL for length reasons
url <- paste0(
'https://www.rocklandgis.com/portal/sharing/rest/',
'content/items/73fc78cb0fb04580b4788937fe5ee697/data'
)
layer <- felt_add_map_layers_url(
    map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
    url = url,
    name = 'URL Parks test')
layer
# and delete the new layer
felt_delete_map_layer(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',  layer_id = layer$layer_id)

Create a new map

Description

Create a new map

Usage

felt_create_map(
  title = NULL,
  basemap = NULL,
  layer_urls = NULL,
  lat = NULL,
  lon = NULL,
  zoom = NULL,
  description = NULL,
  public_access = NULL,
  clean = TRUE
)

Arguments

title

Title to use for the map. Defaults to NULL.

basemap

Basemap for the new map. Defaults to NULL. Can be a URL or color hex code. Text options include 'default' (same as NULL), 'light', 'dark', or 'satellite'.

layer_urls

vector of URLs to generate layers in map. Defaults to NULL.

lat

latitude to center the map. Defaults to NULL.

lon

longitude to center the map. Defaults to NULL

zoom

zoom level to initialize the map with. Defaults to NULL.

description

Description for the map legend. Defaults to NULL.

public_access

Degree of public acess. Defaults to NULL, which is view_only. Text options also include 'private', 'view_and_comment', and 'view_comment_and_edit'.

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble for the new map

Examples


map <- felt_create_map(title = 'feltr example')
map
# and delete it again
felt_delete_map(map_id = map$id)

Delete an existing map

Description

Delete an existing map

Usage

felt_delete_map(map_id)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

Value

response code

Examples


map <- felt_create_map(title = 'feltr example')
felt_delete_map(map_id = map$id)

Delete an existing element

Description

Delete an existing element

Usage

felt_delete_map_elements(map_id, element_id)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

element_id

element identifier, as returned by felt_get_map_elements() or felt_add_map_elements()

Value

response code

Examples


elem <- felt_add_map_elements(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                    elements = fs::path_package('feltr',  'bbox.geojson'))
elem
# and delete layer
felt_delete_map_elements(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA', element_id = elem$felt_id)

Delete Layer from an Existing Map

Description

Delete Layer from an Existing Map

Usage

felt_delete_map_layer(map_id, layer_id, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_id

character, layer identifier from url, from felt_get_map()

clean

logical, whether to turn the API response into a tibble::tibble

Value

response code

Examples


# split the URL for length reasons
url <- paste0(
'https://www.rocklandgis.com/portal/sharing/rest/',
'content/items/73fc78cb0fb04580b4788937fe5ee697/data'
)
layer <- felt_add_map_layers_url(
    map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
    url = url,
    name = 'URL Parks test')
layer
# and delete the new layer
felt_delete_map_layer(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',  layer_id = layer$layer_id)

Export Comments on an Existing Map

Description

Export Comments on an Existing Map

Usage

felt_get_comments(map_id, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble for the map

Examples


felt_get_comments(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA')

List all layers in your workspace library

Description

List all layers in your workspace library

Usage

felt_get_library(source = "workspace", clean = TRUE)

Arguments

source

character, source of the layers, one of workspace, felt, or all

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble if clean = TRUE, otherwise a list

Examples


felt_get_library()

Get Map Information from Map ID

Description

Usage

felt_get_map(map_id, clean = TRUE)

felt_get_map_layers(map_id, clean = TRUE)

felt_get_map_layer(map_id, layer_id, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

clean

logical, whether to turn the API response into a tibble::tibble

layer_id

character, layer identifier from url, from felt_get_map()

Value

a tibble::tibble for the map, if clean = TRUE, otherwise a list

Examples


felt_get_map('Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA')
felt_get_map_layers('Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA')

# slower, as it has to build the shapes from the API result
felt_get_map_elements('Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA')

Get Map Elements from Map ID

Description

Get Map Elements from Map ID

Usage

felt_get_map_elements(map_id, clean = TRUE)

felt_get_map_element_groups(map_id, clean = TRUE)

felt_get_map_elements_in_group(map_id, group_id, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

clean

logical, whether to turn the API response into a tibble::tibble

group_id

group identifier, as returned by felt_get_map_element_groups()

Value

a tibble::tibble for the map

Examples


felt_get_map_elements(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA')
felt_get_map_element_groups('TBI8sDkmQjuK2GX9CSiHiUA')
felt_get_map_elements_in_group('TBI8sDkmQjuK2GX9CSiHiUA', '3Wl5s2AqRmiYgO9CrBFxO3D')

Get information for a layer group

Description

Get information for a layer group

Usage

felt_get_map_layer_group(map_id, layer_group_id, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_group_id

character, layer group identifier from url, from felt_get_map().

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble for the layer group, if clean = TRUE, otherwise a list

Examples


felt_get_map_layer_group(
  map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
  layer_group_id = 'rHxyTef7S9CO8W7n1PvBVwC'
)

Obtain information about the user

Description

Obtain information about the user

Usage

felt_get_user(clean = TRUE)

Arguments

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble of information about the user

Examples


felt_get_user()

Update Felt Style Information for a Layer

Description

For details on the Felt Style Language, see https://felt.com/blog/felt-style-language.

Usage

felt_patch_style(map_id, layer_id, fsl, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_id

character, layer identifier from url, from felt_get_map()

fsl

A list indicating the Felt style language to update the layer to. It must be valid FSL.

clean

logical, whether to turn the API response into a tibble::tibble

Value

response data

Examples


# URL Parks layer
# read as a list
layer <- felt_get_map_layer(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                            layer_id = 'eufG5hWKRRSURHE8YcGGXA',
                            clean = FALSE)
# use the existing style for easiest modification
style <- layer$style
style$label$minZoom <- round(runif(1, 0, 23))

felt_patch_style(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                 layer_id = 'eufG5hWKRRSURHE8YcGGXA',
                 fsl = style)

Refresh an existing layer

Description

Refresh an existing layer

Usage

felt_refresh_layer(map_id, layer_id, file_names, clean = TRUE)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_id

character, layer identifier from url, from felt_get_map()

file_names

file names to upload if the original layer was created with a file upload

clean

logical, whether to turn the API response into a tibble::tibble

Value

a tibble::tibble with upload information

Examples


felt_refresh_layer(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                  layer_id = 'rCfurZSFShycXHCBw69CdKB',
                  file_names = fs::path_package('feltr',  'towns.geojson'))
felt_refresh_layer(map_id = 'Rockland-2024-Districts-TBI8sDkmQjuK2GX9CSiHiUA',
                  layer_id = 'eufG5hWKRRSURHE8YcGGXA')

Update a Layer's Details

Description

Allows for updates to the name, ordering key, and subtitle.

Usage

felt_update_layer_details(
  map_id,
  layer_id,
  layer_group_id = NULL,
  name = NULL,
  ordering_key = NULL,
  subtitle = NULL,
  clean = TRUE
)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_id

character, layer identifier from url, from felt_get_map()

layer_group_id

character, layer group identifier from url, from felt_get_map().

name

Name of the layer. Defaults to NULL.

ordering_key

Integer to order layers. Defaults to NULL.

subtitle

Subtitle for the layer. Defaults to NULL.

clean

logical, whether to turn the API response into a tibble::tibble

Value

response data

Examples


felt_update_layer_details(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                          layer_id = 'eufG5hWKRRSURHE8YcGGXA',
                          subtitle = paste0('tested ', Sys.Date()))

Update a Layer Group's Details

Description

Allows for updates to the name, ordering key, and subtitle.

Usage

felt_update_layer_group_details(
  map_id,
  layer_group_id,
  name = NULL,
  ordering_key = NULL,
  subtitle = NULL,
  clean = TRUE
)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

layer_group_id

character, layer group identifier from url, from felt_get_map().

name

Name of the layer group. Required.

ordering_key

Integer to order by. Defaults to NULL.

subtitle

Subtitle for the layer group. Defaults to NULL.

clean

logical, whether to turn the API response into a tibble::tibble

Value

response data

Examples


felt_update_layer_group_details(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                               layer_group_id = 'rHxyTef7S9CO8W7n1PvBVwC',
                               name = 'Polling Sites 2020',
                               subtitle = paste0('tested ', Sys.Date()))

Update a Map's Details

Description

Allows for updates to the title, description, and level of public access.

Usage

felt_update_map_details(
  map_id,
  title = NULL,
  description = NULL,
  public_access = NULL,
  clean = TRUE
)

Arguments

map_id

character, map identifier from url, from ⁠https://felt.com/map/Readable-Name-map_id⁠

title

Title to use for the map. Defaults to NULL.

description

Description for the map legend. Defaults to NULL.

public_access

Degree of public acess. Defaults to NULL, which is view_only. Text options also include 'private', 'view_and_comment', and 'view_comment_and_edit'.

clean

logical, whether to turn the API response into a tibble::tibble

Value

response data

Examples


felt_update_map_details(map_id = 'TBI8sDkmQjuK2GX9CSiHiUA',
                        title = paste0('Rockland 2024 Districts, tested ', Sys.Date()))

Check or Get Felt API Key

Description

Check or Get Felt API Key

Usage

has_felt_key()

get_felt_key()

felt_get_key()

felt_has_key()

Value

logical if has, key if get

Examples

has_felt_key()

Add Entry to Renviron

Description

Adds Felt API key to .Renviron.

Usage

set_felt_key(key, overwrite = FALSE, install = FALSE, r_env = NULL)

felt_set_key(key, overwrite = FALSE, install = FALSE, r_env = NULL)

Arguments

key

Character. API key to add to add.

overwrite

Defaults to FALSE. Boolean. Should existing FELT_KEY in Renviron be overwritten?

install

Defaults to FALSE. Boolean. Should this be added to an environment file, r_env?

r_env

Path to install to if install is TRUE.

Value

key, invisibly

Examples

example_env <- tempfile(fileext = '.Renviron')
set_felt_key('1234', r_env = example_env)
# r_env should likely be: file.path(Sys.getenv('HOME'), '.Renviron')