extend_AOI_buffer | R Documentation |
Extract the sf-object and raster extent based on a buffer (in meters)
extend_AOI_buffer( dat_gps_tcx, buffer_in_meters = 1000, CRS = 4326, verbose = FALSE )
dat_gps_tcx |
this parameter corresponds to the output data.table of the 'GPS_TCX_data()' function |
buffer_in_meters |
an integer value specifying the buffer in meters. The bounding box of the input coordinates (longitudes, latitudes) will be extended by that many meters. The default value is 1000 meters. |
CRS |
an integer specifying the Coordinates Reference System. The recommended value for this data is 4326 (which is also the default value) |
verbose |
a boolean. If TRUE then information will be printed out in the console |
To create the buffer in meters using the 'sf' package I had to transform to another projection - by default I've used 7801 - as suggested in the following stackoverflow thread, https://stackoverflow.com/a/54754935/8302386
an object of class list
## Not run: require(fitbitViz) #............................ # first extract the log-id(s) #............................ USER_ID = '99xxxx' token = 'my_long_web_api_token' log_id = extract_LOG_ID(user_id = USER_ID, token = token, after_Date = '2021-03-13', limit = 10, sort = 'asc', verbose = TRUE) str(log_id) #................................... # then return the gps-ctx data.table #................................... res_tcx = GPS_TCX_data(log_id = log_id, user_id = USER_ID, token = token, time_zone = 'Europe/Athens', verbose = TRUE) str(res_tcx) #.................................................... # then compute the sf-object buffer and raster-extend #.................................................... sf_rst_ext = extend_AOI_buffer(dat_gps_tcx = res_tcx, buffer_in_meters = 1000, CRS = 4326, verbose = TRUE) sf_rst_ext ## End(Not run)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.