topic Re: use variable for distance in esri leaflet nearby?? in Open Source Mapping Libraries Ques.

use variable for distance in esri leaflet nearby??

Anonymous User — Fri, 25 Aug 2023 20:18:21 GMT

Hello:

How can I use a variable when using the nearby method on a query layer so the user can select the distance in a dropdown or is this not possible?

Here is a snippet of what I have:

HTML

JAVASCRIPT

var distance = document.getElementById("buffer").value;

function myFunction() {
if ((document.getElementById("pm1").checked == true) && (document.getElementById("tm1").checked == true)&& (document.getElementById("sr1").checked == true)){
pmquery.nearby(latlng, distance);

pmquery.run(function (error, featureCollection, response) {
if (error) {
console.log(error);
return;
}
L.geoJSON(featureCollection).addTo(map);
console.log('Found ' + featureCollection.features.length + ' features');
map.fitBounds(L.geoJSON(featureCollection).getBounds());
});

Re: use variable for distance in esri leaflet nearby??

GavinRehkemper — Mon, 23 Nov 2020 14:46:03 GMT

Yes that code looks like it should work. Make sure you check if your "distance" variable is actually defined within your function. You can use console.log to see if the value is defined. As a quick attempt, you could also move the line

var distance = document.getElementById("buffer").value;

within your function "myFunction"

Re: use variable for distance in esri leaflet nearby??

Anonymous User — Sat, 28 Nov 2020 07:50:37 GMT

Thanks Gavin. I had to make it a global variable and use parseFloat to convert from string to integer. I have another question though about how to use onEachFeature to get the attribute for all features when using query.run. I will post it later.