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Breaking sections by chainage values

IoannisLampropoulos

Hi everyone,

quick question. I have a shapefile with the road network in terms of road sections. Each section is represented by a unique field in the table. I am processing some data from Excel that include each section multiple times. Now, two important fields in the Excel are start Chainage and End Chainage. I need to break down the above sections into these "new sections" with regard to the chainage lengths and create a new shapefile. Each of these lengths represents a different value that needs to be plotted accordingly.

Thanks in advance...

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IoannisLampropoulos

Fair enough Chris and thanks for the reply. What if I've got different distances to specify for each segment?

IoannisLampropoulos

Thanks for the reply. So, on the left I've got a shapefile with sections and their lengths. On the right side I've got an analysed table with the same sections, although they appear more than one times. So, for section 1000A/1 I need to attach the value of 17 only in the chainage between 138.029 and 148.04. In addition, for section 1000A/11 for example I need to include the values of 16.8, 17.3, 21.8, 4.4, 22.9 and 15.3 in different chainages. The same occurs to more than 100 sections, so a manual way is not an option.

ChrisDonohue__GISP

One approach would be to split your line shapefile(s) up by specified distances and then join the table back to the appropriate segments (make a copy of the data and work on it).

Methods for splitting line features:

ArcGIS Desktop

Also, if you have the third-party Extension XToolsPro, they offer similar functions with a more automated means accomplishing them (Feature Conversions, Split Polyline).

Chris Donohue, GISP

WesMiller

A picture may demonstrate a little better what you are trying to do. I think you are trying to do Linear referencing datasets in ArcGIS—Linear Referencing | ArcGIS for Desktop

IoannisLampropoulos

Wes thanks for the quick reply.

So let me explain. I've got a map with the road network, where each section is represented by certain attributes (Section 1, Section 2, etc with additional info such as lengths, lanes, description etc). I am now processing some data in an Excel which contains the same sections as before. The point is that within these data, each section has more than one attribute values. E.g. In the shapefile Section 1 has a length of 2km. In the spreadsheet the same section has been divided into more than one "parts", according to the chainage (0-10m, 10-20m,.. 1990m-2km). Each "part" is associated with a different value, say for example from 0-10m there is a value of 1mm, from 10-20m a value of 2.5mm and so on. These values are the ones that I need to show in my map. However, I cannot find a way to give this spatial information to my table and create a shapefile. Of course, I can't join the tables since the relationship is 1:M and I'll lose the rest of each section's values.

Does this help?

WesMiller

Could you post an example of what you are trying to do? Sounds like you are selecting a street segment then getting the intersecting segments, but i'm not clear with your description.

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