otp_create_surface() creates a surface stored in memory on the OTP server and returns its Id number. It can optionally also retrieve and save a raster file (geoTIFF) of the surface for visualisation in R (or other GIS).otp_evaluate_surface() uses an existing surface and a pointset (loaded from a CSV file provided to OTP at server startup) to calculate the travel time to each point location in the pointset file and to generate accessibility indicators for one or more ‘opportunity’ columns. A list is returned containing a dataframe for each ‘opportunity’ and, optionally, a dataframe of the time taken to travel from the surface’s origin to each location point. This function can also be used to retrieve the time from an origin to many destinations.maxWalkDistance parameter (but see below).otp_get_times() function and specified using the MaxItineraries argument.waitReluctance argument has been added to otp_get_times(), otp_get_isochrone() and otp_get_surface() functions.extra.params argument. Available in otp_get_times(), otp_get_isochrone() and otp_get_surface(). Note that no validation of these additional parameters will be carried out by otpr. They will be passed directly to the OTP API.otp_get_times() as a nested dataframe within the itineraries dataframe, rather than as a separate list element.otp_get_times(), otp_get_isochrone() and otp_create_surface()) has been changed from 800 to NULL. This means that the internal OTP default of unlimited is applied. This has been implemented due to the impact of this parameter in OTPv2 (see above). It is now necessary to make a conscious decision on whether to set this parameter and to what value. The default value of 800 that was previously set by otpr was different from the OTP default (which is unlimited) and so this change corrects that anomaly.walkReluctance parameter - this was incorrectly restricted to an integer.otp_get_distance(), otp_get_times() and otp_get_isochrone() now also return the query URL that was submitted to the OTP API. This is for user reference and can be useful for troubleshooting.
Now also imports urltools, used to return decoded query URL.
otp_get_times() now returns a legs datafame, when requested, for WALK, BICYCLE and CAR modes. For these modes this will contain a single leg. This is for consistency with other modes.Since 0.4.0 some parameters (walkReluctance, arriveBy, transferPenalty and minTransferTime) were not being passed to the OTP API by the otp_get_times() function. This has been fixed.
There were instances when otp_get_times() would generate an error when journey legs were requested. This was due to an expected attribute in the OTP API response not being present. There is some inconsistency in the columns that are returned by OTP for the legs, dependent on the mode, and what values appear in the original GTFS feeds. Rather than limit the leg detail to the smaller subset of columns that are guaranteed to be present, the function now includes columns in the legs dataframe for the attributes that are present (as well as additional otpr calculated columns). This could mean some inconsistency in the columns returned in the legs dataframe between queries. If you make use of these extra columns in post-processing then you may need additional code to check for column existence.
otp_get_isochrone() is only supported in OTPv1 as this feature has been removed from OTPv2.maxWalkDistance parameter used in the otp_get_times() function is treated as a hard limit when the mode is either WALK or BICYCLE. This could result in no itinerary being returned as the default is 800m. This is different from the behaviour of OTPv1 where this parameter is effectively ignored when the mode is WALK and not applied at all to BICYCLE trips. Workaround: provide a large value to this parameter for these modes.otp_connect() no longer uses the optional check argument. The function will now always check that the OTP server and specified router are reachable. This is because the version of OTP must now be retrieved from the ../otp endpoint so that otpr can support OTP versions 1 and 2.otp_connect() can appear to fail without the reason - that curl has not been installed after 4.0.0 - being explicitly reported.otp_connect() now retrieves the version of the OTP server. This is contained in the otpconnect object that is returned and reported to the user. Note that OTPv2 does not support named or multiple routers.st_make_valid() function is used in otp_get_isochrone() to correct any geometry errors in the sf object before it is returned to the user. OTP appears to return polygons that fail validation by st_is_valid from the sf package.Added option to request information about each of the legs in a returned transit itinerary. There is a new parameter available for otp_get_times() called includeLegs. If this is set to TRUE (default is FALSE) and detail is also set to TRUE and mode includes a transit mode, then the list returned by the function will contain a third element: a dataframe called legs. This consists of a row for each leg of the trip. Information provided includes departureWait which is the length of time in minutes required to wait for the start of a leg.
Added support for time zones (#7). The OTP API returns itinerary start and end times as EPOCH values. otpr converts these to hh:mm:ss format using the as.POSIXct() function. Previously, a time zone argument was not provided to this function. As a result as.POSIXct() assumed the time zone to be the current time zone of the local system. When the local system time zone is the same as the time zone of the router’s graph then there will be no confusion. However, if the time zone of the graph is different from the time zone of the local system then the start and end times will be expressed in the local system time zone and not the time zone of the graph. To address this the following changes have been made:
tz argument to the otp_connect() function. By default this is set to the local system’s time zone. If the router’s graph is in a different time zone the user can specify it (for example, “Europe/Berlin”).otp_get_times() when the detail argument is set to TRUE now includes an additional ‘time zone’ column. This shows the time zone of the returned itinerary start and end times. This makes explicit what time zone these times are expressed in.Added option to otp_get_isochrone() to return isochrone as either GeoJSON (default) or as a simple feature collection (sf). Specified using the new format argument (#4)
Now also imports geojsonsf, used in otp_get_isochrone()
The unit of time returned by otp_get_times() was inconsistent. When the ‘detail’ parameter was set to TRUE the time was returned in seconds; otherwise the time was returned in minutes. This has been corrected so that time is always returned in minutes (#3).
Remove ‘curl’ from ‘Imports:’ to fix CRAN binary build error on some platforms (#2)
Initial release.