Skip to main content
Solved

Merge Features within One Shapefile together?

K
Hello,

 

 

I believe this is a simple question, but I am still learning FME.

 

 

I attached pictures to help show what I would like to do.

 

 

I would like to merge/combine my features within my shapefile together.  I would like each to be separate instead of an entire shapefile with only one feature, so I do not want to use the Aggregator transformer.  Within my shapefile, I have this... which is actually two separate features.

 

 

 

 

 

 

In this example, I would like to combine 5861 and 5862. 

 

 

I saw this post http://fmepedia.safe.com/CommunityAnswers?id=906a0000000d6OnAAI, so I also tried the LineJoiner transformer, but it did not work.

 

 

I don't think it would be this simple, but here is what I did...

 

 

 

 

Any advice/help will be great!  For my end result, I would just like to have all these features merged together.

Best answer by takashi

Hi Kenny,

 

 

I suppose you are trying to merge lines for each group which will contain one or more lines touching or intersecting each other.

 

As David mentioned, I think the Aggregator is suitable to do that finally, but you will have to add group ID to the lines beforehand, so that the aggregation will be performed for each group.

 

 

One possible way is:

 

(1) Create buffers of the lines by a small amount (tolerance) with the Bufferer.

 

(2) Dissolve them with the Dissolver.

 

(3) Add group ID attribute (sequential number) to the dissolved areas with the Counter.

 

(4) Add a SpatialFilter to the workspace.

 

- send the dissolved areas to the Filter port.

 

- send the original lines to the Candidate port.

 

- set "Yes" to the Merge Attributes parameter so that the group ID will be merged to the original lines.

 

(5) Connect an Aggregator to the Passed port of the SpatialFilter; set the group ID attribute to its "Group By" parameter.

 

 

Takashi
View original
Did this help you find an answer to your question?
This post is closed to further activity.
It may be a question with a best answer, an implemented idea, or just a post needing no comment.
If you have a follow-up or related question, please post a new question or idea.
If there is a genuine update to be made, please contact us and request that the post is reopened.

7 replies

david_r
Evangelist
  • david_rEvangelist
  • March 20, 2015
Hi,

 

 

the LineJoiner expects all your lines to be contiguous, which isnt't the case for the "anchor-shaped" object in the screenshot above. From the LineJoiner help: Each connecting line must meet at the exact same start/end point, but otherwise they must not intersect.

 

 

I would normally sugges the Aggregator here, but I'm not sure why you don't feel it's suitable for your use case?

 

 

David
K
  • kennyutk
  • Author
  • March 20, 2015
David,

 

 

Thank you for responding to me.  I really appreciate it.

 

 

I may be doing it incorrectly since I am still learning, but when I used the Aggregator here it turned all my features (10,000+) into one single feature.  It did of course connect the anchors, but instead of having roughly 5,000 features, I had only 1.

 

 

Do you think I used the Aggregator wrong or would I need to do something else after that?  I can attach a picture to help if I need to.
takashi
Contributor
Forum|alt.badge.img+19
  • takashiContributor
  • Contributor
  • Best Answer
  • March 21, 2015
Hi Kenny,

 

 

I suppose you are trying to merge lines for each group which will contain one or more lines touching or intersecting each other.

 

As David mentioned, I think the Aggregator is suitable to do that finally, but you will have to add group ID to the lines beforehand, so that the aggregation will be performed for each group.

 

 

One possible way is:

 

(1) Create buffers of the lines by a small amount (tolerance) with the Bufferer.

 

(2) Dissolve them with the Dissolver.

 

(3) Add group ID attribute (sequential number) to the dissolved areas with the Counter.

 

(4) Add a SpatialFilter to the workspace.

 

- send the dissolved areas to the Filter port.

 

- send the original lines to the Candidate port.

 

- set "Yes" to the Merge Attributes parameter so that the group ID will be merged to the original lines.

 

(5) Connect an Aggregator to the Passed port of the SpatialFilter; set the group ID attribute to its "Group By" parameter.

 

 

Takashi
K
  • kennyutk
  • Author
  • March 23, 2015
Takashi,

 

 

Thank you for your response.  I will try your suggestion now!  You are very helpful.
K
  • kennyutk
  • Author
  • March 23, 2015
Hello,

 

 

Takashi and David,

 

 

Thank you for helping me out!  I did what was suggested, and it does work.  For now though, I did not include the SpatialFilter transformer.  I do not really need the original attributes, but I would like to learn on how to keep them.  I attached a picture to help show you.

 

 

Could you give me any advice on what I should do with the SpatialFilter?  I have played around with it for awhile, but I can't seem to get it to work correctly.  I believe it is with what attributes I am choosing in the "Group By:" and "Tests to Perform". 

 

 

It looks like I will get 4620 features total.

 

 

Thank you very much! 

 

 

 

 

 

 

takashi
Contributor
Forum|alt.badge.img+19
  • takashiContributor
  • Contributor
  • March 23, 2015
The "Group By" of the SpatialFilter should be left blank, so that the "_count" (group ID) wil be merged to the origianl lines; the "_count" will be used to make groups of the lines.

 

And set "INTERSECTS" (or "CONTAINS") to the "Tests to Perform".

 

 

Then, set the "_count" to the "Group By" of the following Aggregator.
K
  • kennyutk
  • Author
  • March 26, 2015
That worked great!  Thank you very much.  I really appreciate it!

Most helpful members this week

Community Stats

30,846
Posts
116,937
Replies
38,670
Members
Terms & ConditionsCookie settings

Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings
A product of
Safe Software respectfully acknowledges that we live, learn and work on the traditional and unceded territories of the Kwantlen, Katzie, and Semiahmoo First Nations.