What is the best way to obtain rooftop geocode address accuracy
for an address in egypt.
My objective is to get the best point location (latitude, longitude) within 10 meters deviation from address produced by geocode process.
I see building numbers on egypt map, but when I try to include this number in geocode request, it gives me wrong location point.
Thanks for your support.
Are you trying to extract the geocode information from an IP address or is your problem with the gmaps API?
When looking at the maps in Egypt it seems to me that the numbers are not part of the street information but are rather added by contributors as details for each representation of a building. That's why when you call an address by streetnumber you will not get a precise location.
Related
I am a researcher and my lab is currently evaluating the possibility of using HERE.com's geocoder as an alternative to Google Maps. We are running into some major issues with precision in the geocoder, because the smallest distances that can be discriminated between with the default 5 decimal limit is larger than the distance between about 25% of the parcels we are geocoding. Is there a way to increase the precision of the geocoder? I wasn't able to find anything relevant in the documentation.
It appears that for some reason 20 Nonantum Street wasn't in our database. Curiously, this is the only house on the street that was missing.
Since the Geocoder couldn't find the address, is was then resolving to the next closest number, which is 18. This is why both addresses resolved to the same location. It resolved 18 Nonantum correctly and also used it as a fallback for 20 Nonantum.
I've submitted an edit to the database. Once this has been verified but our map content team, the address should start resolving correctly. Thank you for reporting this!
Using HERE Maps Api, for a geographic coordinate (lat, lng), I would like to find address information for the nearest routable road. Information that includes:
Address (street, house number, city, postal code, country)
Bearing/Heading of the road (0 to 360 degrees from True North)
How can I achieve this through HERE Maps API?
So far, this is what I have been able to achieve:
Calling the calculate Route API with identical start and end endpoints and mode=car will force the API to snap to the nearest routable point. This step is necessary for when the input coordinates are for a pedestrian street.
Using the nearest routable point coordinates, I can call reverse GeoCode API and I will be able to find the address information I need.
The next step is where I'm currently stuck. I'm able to find information like direction=NW, however I can't find the ~exact bearing in grad, for example bearing=265.
Is this achievable? Are 3 steps really necessary or is there a HERE Maps API endpoint that can provide all of this?
You can use the Fleet Telematics API to get the headings value for a particular road. Read more about the api here - https://developer.here.com/documentation/platform-data/topics/quick-start-view-map-data.html
You can also look at the field explanationshere - https://tcs.ext.here.com/pde/layer?region=WEU&release=19111&url_root=pde.api.here.com&layer=ADAS_ATTRIB_FC1
HEADINGS Horizontal road heading [10^-3 degree] at coordinate points along the link, when driving from Reference Node. Comma separated. Each value is relative to the previous. No values here for the ref/nonref nodes, because they are in the separate fields REFNODE_LINKCURVHEADS and NREFNODE_LINKCURVHEADS.
I am using the Here API to search for roads where traffic accidents occur in my home town. My aim is to extract the full road coordinates (as sequence of of lat/lons) where the accident is active in order to draw that road on a reasonable scale.
Using the traffic/6.1/incidents API, I query for the data using a geographical bounding box. An accident in the response is described by one pair of TMC locations as well as one pair of lat/lon geographical points. This data is too coarse-grained for plotting the roadway. (Please correct me if I am wrong here, but I would like to add some more detail about turns of the road.)
My question regards what I found when I turned to examine the rest of the accident/incident response, containing so-called NAVTECH data on this (XML) form:
<NAVTECH><EDGE><EDGE_ID>1150578390</EDGE_ID><EDGE_ID>1150578391</EDGE_ID>
<EDGE_ID>...</EDGE_ID>
<VERSION_ID>201604</VERSION_ID></NAVTECH>
My question is: Is there any available method to map the NAVTECH edges to pairs of lat/lon coordinates?
I have searched Here.com, the here-api stackoverflow tag and tried to Google for an answer, but I find so little documentation on this type of data. I am looking for all information I can find to (i) Describe the NAVTECH edges and their meaning, (ii) How to map NAVTECH to geographical coordinates. In general, (iii) Can I use the Here API to get more geographical information than this about roads where there are accidents?
Kind regards,
Vilhelm from Sweden
You can pass a lat/lon to their routing API and get back the shape point coordinates (and other attributes) for the road edge at that location, like this:
https://route.cit.api.here.com/routing/7.2/getlinkinfo.xml?waypoint=43.066628,-71.471729&app_id=DemoAppId01082013GAL&app_code=AJKnXv84fjrb0KIHawS0Tg&linkattributes=all
Unfortunately, though, this may not be a long term solution, as seaBass states here:
getlinkinfo will depreciated March 31, 2017. In order to get speed limit information you will have to use PDE (Platform Data Extension) which requires an APP ID and Code
I am trying to geocode NYC high schools by using the Maps Geocoding API and the unique BN code assigned to each high school. For example, typing K733 into Google Maps results in a marker on MESA Charter High School in Brooklyn, NY. However, when I use the API url like so:
https://maps.googleapis.com/maps/api/geocode/json?address=K733
I keep getting "ZERO_RESULTS". I've also tried using the Places API and I've gotten the same results. Can anyone point me in the right direction? Is it even possible to pull this information from Google Maps?
It not possible to use unique BN codes for Maps Geocoding API because the address component requires postal address
address — The street address that you want to geocode, in the format
used by the national postal service of the country concerned.
Additional address elements such as business names and unit, suite or
floor numbers should be avoided. Please refer to the FAQ for
additional guidance.
I am using Google Maps API v3 Distance. It has worked well for the majority of the addresses in my database. However, it seems like some addresses just aren't available in Google Maps, and it seems to pick the closest street address match which could be way off. I would expect Google Maps in this case to provide an answer based on city and zip. Does anyone have a solution? I've thought of double checking mathematically by geocode and checking Yahoo maps(or other sites) for the ones that are way off but that adds processing time and is not a very elegant solution. There must be some setting I'm missing or other such work around.
Thanks!
BTW shout out to the new Json Serializer! Well it was new to me anyways.
How are you formatting the address you are sending ?
I've used the Google Maps API to do some reverse geocoding and if a street could not be found (due to a typo or what have you) Google would return the lat lng for the historic town center.
I structured addresses as Country, city cityzip, street nr.
You should use the location_type of the geometry object to determine what accuracy was returned. I suggest checking to see if the returned resulsts indicate whether a result is anything other than ROOFTOP or RANGE_INTERPOLATED.