topic Re: Looking for the right Analytics in ArcGIS Pro Questions

Looking for the right Analytics

Student123321 — Thu, 20 Jul 2023 12:44:10 GMT

Hey Guys,

Sry in advanved for my Bad english.

I have a Point layer with around 60000 Features. And I want a new attribute which shows me how many features in a range of 300 m of each feature. Anyone have a Idea how to do that? I couldnt find any good Analytic function. And my phytoncode didnt work as well.

Thank you

Re: Looking for the right Analytics

JohannesLindner — Thu, 20 Jul 2023 14:13:15 GMT

Summarize Nearby

Re: Looking for the right Analytics

Student123321 — Thu, 20 Jul 2023 15:55:39 GMT

I will try that one.

Ty for the quick answer and have a great day too!

Re: Looking for the right Analytics

Student123321 — Fri, 21 Jul 2023 11:35:58 GMT

I tried "Summerize Nearby". And I wanted him to summery atributes within the range I entered. I had i.e. 2 Features in that range and the atribute "hight" in bothes Features were 1 . The Result suppode to be 2. But but in the new atrubte field it says 1,99989. Can someone explain me , why it is like that?

Re: Looking for the right Analytics

JohannesLindner — Fri, 21 Jul 2023 13:58:48 GMT

Because your height attribute is a floating point number and doing calculations on floating point numbers in the binary system is imprecise.

If you want further information why this is the case, here are two good starting points:

https://stackoverflow.com/questions/588004/is-floating-point-math-broken

https://stackoverflow.com/questions/21895756/why-are-floating-point-numbers-inaccurate