topic Re: select polylines with same field name as points layer in Spatial Data Science Questions

select polylines with same field name as points layer

DanielBrenner — Thu, 18 Sep 2014 23:50:30 GMT

I am primarily trying to do this in Geomedia Professional but ArcGIS is my "native" GIS language so here goes. I did a version of what I want in Geomedia but the result was screwy. The main reason I'm posting on this board is to learn what are the same types of commands or tools I need to use in Geomedia.

I have a points layer of all the locations where a streets layer intersected a polygon. The points layer has the same street name field as the streets layer.

I ultimately want to create a streets layer of all the streets that intersect the polygons. I have thought one way to do this is using a Field Equation of Street Name (points layer) = Street Name (polyline layer). However I can't seem to figure out the correct syntax for a field equation in the points layer, and even if I add a text field for Field Equations, it gives me numbers in the field automatically??! I thought you could Select by Points? I did see there's an Extract By Points function in ArcTool Box but you need a Network Analyst license to do it and we don't have one.

In Geomedia, the Join Functionality allows you to do exactly what I want (use street field names from both layers) but it ends up giving me more street segements than are actually intersecting the polygons. Bizarre.

I've attached some Jpgs of what happened in Geomedia.

Thanks,

Dan B

Re: select polylines with same field name as points layer

DarrenWiens2 — Thu, 19 Mar 2015 16:34:13 GMT

I ultimately want to create a streets layer of all the streets that intersect the polygons.

Why not Clip the streets by the polygon layer?

Re: select polylines with same field name as points layer

DanielBrenner — Thu, 19 Mar 2015 17:35:16 GMT

Help me this way.

Put the polyline file on top of the polygon file.

Notice in the table the Distance value is 0-0.503.

I need 3 segments with 3 different lengths--0-x, x-0.503, 0.503-x.

How do I split the polyline so that I can get 3 different values?

Add fields if need be.

If this can be done in Geomedia Professional 6.1 then terrific.

Thank you.

Re: select polylines with same field name as points layer

DarrenWiens2 — Thu, 19 Mar 2015 18:36:20 GMT

It sounds like you'd want Feature to Line for this (Advanced License required) - the third situation below.

Alternatively, since you've already go the intersection points, you could use Split Line at Point (also requires Advanced License).

Re: select polylines with same field name as points layer

DanielBrenner — Thu, 19 Mar 2015 21:31:42 GMT

I don't have an Advanced License, that's why I'm posting and asking for

your help.

Did you try to do what I was asking?

Please?

Honestly, it shouldn't be that hard to Re-Calibrate or Re-Calculate

odometer values once a segment length changes.

Yes the two segments both have the same begin and end measures (0 - 0.503),

but what does it take to convert that into two separate values?

Dan

Re: select polylines with same field name as points layer

DanielBrenner — Thu, 19 Mar 2015 21:35:18 GMT

Have you ever worked with Geomedia?

Have you worked with the Transportation Manager extension in Geomedia?

If you have then you would know adequately what I am talking about in terms

of recalculating values.

Re: select polylines with same field name as points layer

DarrenWiens2 — Thu, 19 Mar 2015 21:52:39 GMT

I did look at your data, but I'm really lost on what exactly you're asking. Your line was split into three segments, so it seems you know how to do that. Please try rephrasing your question if you want more help from me.

Re: select polylines with same field name as points layer

DanielBrenner — Fri, 20 Mar 2015 00:52:42 GMT

What is it that you are lost on?

Instead of one segment with the same measurement~~0-0.503~~I need 3

segments (e.g., select segments that are within Urban Area == 1 shapefile,

select segments that are Outside of Urban Area == 1 shapefile), but then

instead of the segments all still having 0-0.503, I need to re-calculate

the distance for each segment and have it appear sequentially. In this

case:

Urban segment 1: 0-x.

Rural segment 1: x-y.

Urban segment 2: y-0.503.

The problem I have is that no matter what I seem to do in Geomedia 6.1

using its Analytical Merge function, and creating new Begin and End fields

for measures for the segments, I am always getting 2 segments of 0-0.503,

and then something else equally wacky.

Have you used Geomedia 6.1? If you haven't then that may be a problem

because this project is centered around using it for certain things but

there is a lot that ArcGIS 10.x can do that Geomedia

Professional/Transportation Manager can't.

Re: select polylines with same field name as points layer

SepheFox — Wed, 06 May 2015 02:52:05 GMT

Seems a bit rude. Darren has tried to help, but your question is confusing. It's hard to even tell if you want an ArcGIS solution or a Geomedia one. Maybe there is a Geomedia forum you could ask on?

Re: select polylines with same field name as points layer

DanielBrenner — Wed, 06 May 2015 08:30:35 GMT

Sephe:

I actually was able towork out the issues I was having before. It had to

do with a Geomedia Transportation Manager-specific functionality I didn't

know when was going to be fixed/activated. The specific functionality (LRS

Calibration? I believe?) was fixed recently, and things fell into place

(proper Postmile/Odometer Values).

I still have bigger needs based on the layer I have been able to create,

but I have had to put it aside based on other job requirements.

DO YOU have specific experience in Geomedia 6.1? Transportation Manager?

If you do, you might be able to help out.

Tell me more about your specific experience with Geomedia.

Dan Brenner

Re: select polylines with same field name as points layer

SepheFox — Wed, 06 May 2015 12:16:37 GMT

No, I have no experience with Geomedia. This is an ESRI forum, and so you might be looking in the wrong place for Geomedia experts. I'm going to go ahead and mark your question as answered for now, since you say you have resolved your issues.

Re: select polylines with same field name as points layer

SepheFox — Wed, 06 May 2015 12:22:08 GMT

It sounds like you could just select the field and calculate geometry values. That's what I would do in ArcGIS, but I don't know if Geomedia is the same.