Points à l'intérieur des Polygones par Temps

Question

<\/HEAD>Bonjour ! <\/P> <\/P> Je suis assez nouveau sur ArcMap et la version la plus récente dont mon entreprise dispose d'une licence complète est ArcMap 10.1. (Nous avons également certaines des extra tools sous licence) <\/P> <\/P> J'ai un ensemble de points sur la carte (pickups et dropoffs), chacun correspondant à un champ temporel. J'ai aussi un ensemble de polygones (bus routes), qui ont tous des heures de début et de fin. Est-il possible pour moi de trouver quels points se trouvent à l'intérieur des polygones à la fois géométriquement ET par temps ? Je sais que je pourrais faire une jointure spatiale juste pour le géométrique, mais le temps me pose problème. Y a-t-il un moyen de faire cela ? En gros, j'essaie de savoir si ces trajets sont conformes ADA (dans un rayon de 3\/4 mile d'une bus route active).<\/P> <\/P> Merci !<\/P><\/BODY><\/HTML>

Melinda Morang · Answer

Here's a suggestion from a colleague:

Do it in two passes:

Pass 1: Spatial Validation – spatial join from “Pickup” points to the “Bus Route” polygons

* Each pickup point (in JoinLayer) now knows which bus route it is within
* A point not within any active bus route area (ie: null joined-field values) is non-compliant

Pass 2: Temporal Validation – select by attributes to check if the date range is OK

* Find the good ones (it’s easier SQL to write)
* Select from JoinLayer where* [PICKUP_TIME] >= [ROUTE_START_TIME]
* AND [PICKUP_TIME] <= [ROUTE_END_TIME]

* Invert the selection -> the pickup point is outside its joined bus-route time

ONE BIG LIMITATION though:

* Not guaranteed to work with points inside multiple (overlapping) bus route polygons* The joined bus route time-frame may not comply, but another one might
* Spatial join only gives you one result…

* Suggestion:* Run the above
* For the ‘failures’, identify pickup points that are in multiple bus routes
* Mark these as “maybe’s”
* Handle them some other way (if only a few, maybe manually?)

JesseIsaacson · Answer

Anyone have any ideas?

JesseIsaacson · Answer

Melinda,

Thanks for the reply! You are correct about the 3/4 mile.  A few paragraphs below where your link sent me it says "(e) Hours and days of service. The complementary paratransit service shall be available throughout the same hours and days as the entity's fixed route service."  This means that the service area is only within 3/4 of a mile of an ACTIVE bus line.  So if that bus route goes from 6am to 9pm, you only have to compliment it by law in a 3/4 mile boundary from 6am to 9pm.  That's part of my problem.

I have the time slider and everything set up in 10.1, and all the data is time-enabled.  I just need to figure out how to build a data set of all the points that fall in the polygons both geographically and when the polygon is active.