topic Re: Point shape report in Geoprocessing Questions

Point shape report

JohnnyJohansson — Mon, 20 Feb 2017 12:40:27 GMT

I want to create a clean and simpel report and diagram with:

points per Hectars
points mean value (Topheight),
point per hectar and where I can see that amount of points that have (topheight) values.

Exampel:

Total points: 4000 point = 400/ha

Mean (topheight): 6 meters

400 points per/Ha, where 100 are 2meter, 200 are 3meter, and so on..

How do I do this?

Arcgis 10,4, spatial analyst, 3d analsyst.

Attached shapefile of intrest. with polygon border.

/Johnny

Re: Point shape report

DanPatterson_Retired — Mon, 20 Feb 2017 12:43:00 GMT

So what have you tried so far? What form of report is needed? Are you adept at scripting?

Re: Point shape report

AbdullahAnter — Mon, 20 Feb 2017 15:49:21 GMT

Maybe the following links will be helpful:

About symbolizing layers to represent quantity—Help | ArcGIS Desktop

What are graphs in ArcGIS?—Help | ArcGIS Desktop

A quick tour of reporting—Help | ArcGIS Desktop

Re: Point shape report

JohnnyJohansson — Mon, 20 Feb 2017 17:50:47 GMT

Hi Dan.

I hvent really tryed anyting aoccessfull..

Near tool on the point with the same point to get spacing between, this is also an factor that would be intressting, but not my focus right now.

I had a quick lock at reports in the attribute tabel, but that dosent really give me what i want.

Tryed avrage nearest naighbor report, but I diddent relly figure ut what I got back in that in the report.

Scripting is'nt relly my thing, quite good at model builder..

Gonna have a lock at the links Anter.

but to be abel to just print an paper or PDF would be the ting...

/Johnny

Re: Point shape report

AbdullahAnter — Mon, 20 Feb 2017 18:28:46 GMT

Use Spatial Join Tool Spatial Join—Help | ArcGIS Desktop , to know what each point fill inside which polygon . you will get that with attached attribute.

Then Use Summary Statistics tool Summary Statistics—Help | ArcGIS Desktop using the attached field that relate to polygon name or number.and make your statistics analysis for.

Re: Point shape report

JohnnyJohansson — Tue, 21 Feb 2017 12:51:47 GMT

Thanks Abdullah Anter.

Not really what I thought to do... But its a step atleast to find the height distrubution that does the trick. But I leave that for now.

I have points for all polygons.

I want to do thease calculations and add the results to each polygon so that you easly can use the "info" tool to get this:

Area - This is alredy in the polygon.

Sum of points within each polygon

Sum of points within each polygon / (devided) by Area

Mean value of points within each polygon

Avrage spacing of points: √10000/(Sum of points within each polygon / (devided) by Area)

Not easy to understand how to really do this, peferly I would like to use modelbuilder so i can add this to the other analasys where i got this data from.

Re: Point shape report

JohnnyJohansson — Tue, 21 Feb 2017 14:02:54 GMT

In this case the polygon feature only has unike field value in "OBJECTID", after spatial join "OBJECTID_1".

Re: Point shape report

JohnnyJohansson — Wed, 22 Feb 2017 08:43:28 GMT

OK, to answer myself.

First of all Abdullah Anter was right.

To do what I wanted I needed to understand how Join and Relate really works.

Then just add fields and calculate them in modelbuilder as desired.

1. Join by spatial reference

2. Statistics based on a comon field attribute ex. "ObjectID" to get them to correspond to eachother.

3. Join Field from the statistics to the polygon.

4. Then add fields an do the nesseserry calculations.