topic Re: Geocoding list of Addresses in ArcGIS JavaScript Maps SDK Questions

Geocoding list of Addresses

Charan — Thu, 18 Jan 2024 21:06:46 GMT

Hi everyone, I have created a functionality which allows users to upload an Excel file containing addresses and I'm then geocoding those addresses to get statistics within the buffer. My issue is that the order of my addresses changes when geocoding.

Re: Geocoding list of Addresses

BlakeTerhune — Thu, 18 Jan 2024 19:58:42 GMT

Is the order based on a sorting definition for a particular field or set of fields? If not, you would have to reference the original order and copy each geocode row out individually in the order you want.

Re: Geocoding list of Addresses

Charan — Thu, 18 Jan 2024 21:08:22 GMT

@BlakeTerhune so in the second for loop (see below). The list of addresses (params) is still in order but the results change it

for (var i = 0; i < params.length; i++) {
}

Re: Geocoding list of Addresses

JeffreyThompson2 — Thu, 18 Jan 2024 21:08:52 GMT

I think I know what's happening. When you send the locations to the geocoder, it returns a promise which is resolved whenever it is completed, which may or may not be in the order it was sent. So, the result list is jumbled. As for how to fix it... I don't know.

Re: Geocoding list of Addresses

ReneRubalcava — Thu, 18 Jan 2024 21:56:06 GMT

If you adjust the logic of how you are doing things a bit, you can create an array of promises and wait for them all to complete. It does require another loop to do your buffer, but this could help you maintain the order you are looking for.

const geocodePromises = params.map( (param) => locator.addressToLocations(...) ); Promise.all(geocodePromises).then((results) => { // do something with results });

Note, you can use Promise.all or Promise.allSettled. The result signatures are different, but depends on your needs.

Re: Geocoding list of Addresses

BlakeTerhune — Thu, 18 Jan 2024 22:00:48 GMT

Are you sure they're in the right order when read into list_address and params?

Re: Geocoding list of Addresses

BlakeTerhune — Thu, 18 Jan 2024 22:06:15 GMT

Ah, yes, good point! You would probably have to leverage the await operator.

Re: Geocoding list of Addresses

Charan — Fri, 19 Jan 2024 18:38:19 GMT

yup, I ran console.log on both and the order was correct

Re: Geocoding list of Addresses

Charan — Fri, 19 Jan 2024 19:07:29 GMT

Hi @ReneRubalcava I used the following code, however, I'm getting an error at location.x

Re: Geocoding list of Addresses

ReneRubalcava — Fri, 19 Jan 2024 20:15:26 GMT

This probably means there was not a result for that address, so you probably need to add some checks that you have a valid result.