# Forest Carbon Edge Effect - striping in raster outputs **URL:** \ **Category:** Software Support\ **Tags:** carbon-edge-effects\ **Created:** [July 22, 2019, 8:10am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341 "2019-07-22T08:10:51Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 22, 2019, 8:10am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/1 "2019-07-22T08:10:51Z")
Hello, I used the Forest Carbon Edge Effect module and keep getting result like the one I attached. Can you explain me what the stripes mean or where they come from? I have tried different Parameters for the Input but it doesn’t seem to go away. here the Output: ![Forest%20Edge%20total](https://canada1.discourse-cdn.com/flex031/uploads/naturalcapitalproject/original/1X/a26f9f5c7d641646725781f932da1e5b377a3d88.jpeg) I hope you can help me! 🙂 Kind regards, Alex ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 22, 2019, 8:11am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/2 "2019-07-22T08:11:26Z")
The Input Looks very different: ![LULC](https://canada1.discourse-cdn.com/flex031/uploads/naturalcapitalproject/original/1X/c020ab3ee7ef47bca60ce19753f9df9ab74322f1.jpeg) ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 22, 2019, 8:12am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/3 "2019-07-22T08:12:00Z")
and here the stripes I talked about: ![Forest%20Edge%20Effect](https://canada1.discourse-cdn.com/flex031/uploads/naturalcapitalproject/original/1X/119a13bc05fe517a6f4c3955de90b32100b2cf89.jpeg) ---
**Author:** ![dave](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dave/32/70_2.png) [@dave](https://community.naturalcapitalalliance.org/u/dave)\ **Post date:** [July 22, 2019, 6:46pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/4 "2019-07-22T18:46:15Z")
Thanks for posting the screenshots. Would you mind also uploading a logfile from the model’s workspace, so we can see all the input parameters and the version of the model you are using? ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 22, 2019, 10:06pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/5 "2019-07-22T22:06:52Z")
[InVEST-Forest-Carbon-Edge-Effect-Model-log-2019-07-17–10\_28\_45.txt](https://community.naturalcapitalalliance.org/uploads/short-url/1c7qBCD1xRaMf7s7YaypooIQpIv.txt) (176.5 KB) ---
**Author:** ![dave](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dave/32/70_2.png) [@dave](https://community.naturalcapitalalliance.org/u/dave)\ **Post date:** [July 23, 2019, 5:05pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/6 "2019-07-23T17:05:13Z")
@rich I wonder if this striping effect could be related to the distance-transform issue that you worked on for Joanna? Looking at the history, I believe that bugfix went into pygeoprocessing 1.7.0, while InVEST 3.7.0 was released with 1.6.1. What do you think? ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 25, 2019, 12:32pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/7 "2019-07-25T12:32:14Z")
Thank you for responding. Do you have any other ideas what I could try? ---
**Author:** ![dave](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dave/32/70_2.png) [@dave](https://community.naturalcapitalalliance.org/u/dave)\ **Post date:** [July 25, 2019, 11:29pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/8 "2019-07-25T23:29:25Z")
It looks like a bug of some kind. Would you mind sending me a link to your input data (google drive, dropbox, etc) and I can try to pinpoint the problem? You may put it in a private message to me if you would rather not post it here. ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 26, 2019, 7:03am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/9 "2019-07-26T07:03:21Z")
Thank you for offering that. I appreciate it. I sent you the data via email. ---
**Author:** ![dave](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dave/32/70_2.png) [@dave](https://community.naturalcapitalalliance.org/u/dave)\ **Post date:** [July 30, 2019, 12:08am UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/10 "2019-07-30T00:08:32Z")
Thanks for sending your input data. I have reproduced this issue with InVEST 3.7.0. I also tested a development version of InVEST built with pygeoprocessing 1.7.0 (see my comment above) and that version yields no stripes. So I do think this was a bug in an underlying library that we have already fixed. I’ll post a link here soon to a development version with the fix that you may install. Otherwise the fix will be in the next official release of InVEST. ---
**Author:** ![alkimbu](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@alkimbu](https://community.naturalcapitalalliance.org/u/alkimbu)\ **Post date:** [July 30, 2019, 4:53pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/11 "2019-07-30T16:53:39Z")
Thank you for your asistance! I‘d love the link to the development Version. ---
**Author:** ![dave](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.naturalcapitalalliance.org/dave/32/70_2.png) [@dave](https://community.naturalcapitalalliance.org/u/dave)\ **Post date:** [July 30, 2019, 5:42pm UTC](https://community.naturalcapitalalliance.org/t/forest-carbon-edge-effect-striping-in-raster-outputs/341/12 "2019-07-30T17:42:34Z")
InVEST development build for Windows: [https://www.googleapis.com/download/storage/v1/b/releases.naturalcapitalproject.org/o/invest%2F3.7.0.post115%2Bh78f7867f5d27%2FInVEST\_3.7.0.post115%2Bh78f7867f5d27\_x86\_Setup.exe?generation=1564446166605071&alt=media](https://www.googleapis.com/download/storage/v1/b/releases.naturalcapitalproject.org/o/invest%2F3.7.0.post115%2Bh78f7867f5d27%2FInVEST_3.7.0.post115%2Bh78f7867f5d27_x86_Setup.exe?generation=1564446166605071&alt=media) Thanks for letting us know about this issue!