topic Re: Create custom symbology in ArcGIS Online Questions

Create custom symbology

ndrogemuller1 — Tue, 13 Aug 2024 08:30:13 GMT

Hi, I have a road layer which has a "last maintained" attribute column showing date. How do I create symbology in Map Viewer which differentiates between a date less than 60 days from current date and more than 60 days from current date?

Thanks.

Re: Create custom symbology

RichardHowe — Tue, 13 Aug 2024 09:13:53 GMT

Create a variable with your last maintained field and add 60 to it, then call Now() and compare them e.g.:

var LM = $feature.LastMaintained

var sixtydays = DateAdd(LM, +60, "days");

var today = Now()

If (sixtydays < today) {

return "Overdue"

} else {

return "Not due"

}

This will give you two optional outputs to symbolise

Re: Create custom symbology

ndrogemuller1 — Tue, 13 Aug 2024 10:27:54 GMT

Thanks for the reply,

Being new to this, I've tried writing the above in the expression, with no luck. Mind you though the actual name of attribute is "Grade_date" which I put in.

How exactly am I to write the expression?

Re: Create custom symbology

RichardHowe — Tue, 13 Aug 2024 10:42:16 GMT

Are you putting the expression in here:

You would need to replace the "LastMaintained" with Grade_date (if you delete everything after the dot then it should show you a field list to pick from with the intellisense)

You can always click run inside the expression window to check it is giving you a viable answer.

I am also assuming that your "Grade_date" has a field type of "date", rather than being a string or a number.

Assuming all this is correct then you pick a style in your case "Types (unique symbol)" and then set your symbology - one for "Overdue" and one for "Not yet due"

Re: Create custom symbology

ndrogemuller1 — Tue, 13 Aug 2024 11:31:11 GMT

Thanks Richard!

Turns out I had the field type as text string and not date. Fixed that and now all good.

Thanks!

Re: Create custom symbology

RichardHowe — Tue, 13 Aug 2024 11:33:02 GMT

No worries, glad it's sorted 😊