# AUS2200 vegetation fraction ancil creation issues

**URL:** <https://forum.access-hive.org.au/t/aus2200-vegetation-fraction-ancil-creation-issues/1972>\
**Category:** AUS2200\
**Created:** [27 March 2024 06:20 UTC](https://forum.access-hive.org.au/t/aus2200-vegetation-fraction-ancil-creation-issues/1972 "2024-03-27T06:20:38Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![mlipson](https://avatars.discourse-cdn.com/v4/letter/m/5f8ce5/32.png) [@mlipson](https://forum.access-hive.org.au/u/mlipson)\
**Post date:** [23 October 2024 00:24 UTC](https://forum.access-hive.org.au/t/aus2200-vegetation-fraction-ancil-creation-issues/1972/20 "2024-10-23T00:24:44Z")

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Thanks Chermelle, looking forward to a general solution. For the subset of the missing canopy height problem I have a suggested one-line update.

In the file:  
`~/cylc-run/u-dg767/src/contrib/Apps/CanopyHeights/canopy_heights.py`  
increase the neighbourhood search radius from 500 km to, say 2500km:

```auto
loop_lim_y = index_nearest_neighbour.ydist2index(trees, 2500)

```

This didn’t seem to slow down the ancil generation process (full app runtime was still only 30 seconds).

Results before and after, with problem cells circled in red.  
Before:

 ![canopy_height_d1000](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/6/685f8cbc1c84d22a7279d8737354a55cbf0b00c9.png)  
After:  
 ![canopy_height_d1000_updated](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/6/69d4e9cbf6c857003000e07d2c30db9bbefd4d82.png)

This also works for high-resolution domains.  
Before:

 ![canopy_height_d0198](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/b/ba97a5ba5077237eae3bee5e87b0ffbc800f94a5.png)  
After:  
 ![canopy_height_d0198_updated](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/c/cd21a566b013bbe0a5dd223375b970e9bd7281c8.png)

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