# Possible problem with the onroad shapefile in the EPA 2014-2016 Air Emissions Modeling Platform

**URL:** <https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078>\
**Category:** NEI Modeling Platform\
**Created:** [October 28, 2019, 2:33pm UTC](https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078 "2019-10-28T14:33:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![junhua.zhang](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@junhua.zhang](https://forum.cmascenter.org/u/junhua.zhang)\
**Post date:** [October 28, 2019, 2:33pm UTC](https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078/1 "2019-10-28T14:33:40Z")

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We recently noticed a possible problem with shapefile  
ftp://newftp.epa.gov/air/emismod/2016/alpha/spatial\_surrogates/shapefiles/2014shapefiles.hpms.tar.gz, which is included in the EPA 2014-2016 Version 7 Air Emissions Modeling Platforms for onroad surrogates generation. In this shapefile, “unrestricted” road (moves2014 code = 03 and 05) are missing almost entirely for the city of Los Angeles. As a result, SMOKE processed onroad emissions using surrogates generated from this shapefile would be very low for LA. There might be similar problems for other areas, but we did not check. Could you please check this shapefile and advise how to fix it?

Many thanks!

Junhua

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**Author:** ![junhua.zhang](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@junhua.zhang](https://forum.cmascenter.org/u/junhua.zhang)\
**Post date:** [November 5, 2019, 10:18pm UTC](https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078/2 "2019-11-05T22:18:48Z")

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I checked surrogates included in the 2014-2016 platform generated for the CMAQ CONUS12 grid. A weight shapefile named “AKhpms2013\_lcc” was used for generating onroad surrogates. However, the onroad shapefile available on the ftp site is “hpms2013\_lcc”.

Could you please provide me the “AKhpms2013\_lcc” shapefile?

Many thanks!

Junhua

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**Author:** ![bbaek](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/bbaek/32/22_2.png) [@bbaek](https://forum.cmascenter.org/u/bbaek)\
**Post date:** [November 6, 2019, 4:12pm UTC](https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078/3 "2019-11-06T16:12:44Z")

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@junhua.zhang. AKhpms2013\_lcc Shapefiles are for Alaska, USA. I have uploaded this shapefiles to the CMAS data warehouse. Click the link below to download:  
[https://drive.google.com/drive/u/1/folders/1jEWk2-fECzOg2UZmJkkWw85L9wJa7A17](https://drive.google.com/drive/u/1/folders/1jEWk2-fECzOg2UZmJkkWw85L9wJa7A17)

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**Author:** ![junhua.zhang](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@junhua.zhang](https://forum.cmascenter.org/u/junhua.zhang)\
**Post date:** [November 8, 2019, 8:51pm UTC](https://forum.cmascenter.org/t/possible-problem-with-the-onroad-shapefile-in-the-epa-2014-2016-air-emissions-modeling-platform/1078/4 "2019-11-08T20:51:16Z")

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Thank you very much BH! The shapefiles you provided are VERY helpful.

Here is what we found:

1. You are right. AKhpms2013\_lcc is for Alaska. However, the header of onroad surrogate for the CONUS12 grid does not give correct information for shapefile used. As an example, below is the header of surrogate 211 showing AKhpms2013\_lcc is used for that surrogate:

GRID CONUS12k\_444x336 -2736000.000000 -2088000.000000 12000.000000 12000.000000 444 336 1 LAMBERT meters 33.000000 45.000000 -97.000000 -97.000000 40.000000  
#SRGDESC=211,Rural Restricted Road Miles

# 

#SURROGATE REGION = USA  
#SURROGATE CODE = 211  
#SURROGATE NAME = Rural Restricted Road Miles  
#DATA SHAPEFILE = cb\_2014\_us\_county\_500k\_Poly  
#DATA ATTRIBUTE = GEOID  
#WEIGHT SHAPEFILE = AKhpms2013\_lcc  
#WEIGHT ATTRIBUTE = NONE  
#WEIGHT FUNCTION =  
#FILTER FUNCTION = M2014=2  
#MERGE FUNCTION =  
#SECONDARY SURROGATE = Total Road Miles  
#TERTIARY SURROGATE =  
#QUARTERNARY SURROGATE =

1. We found a new HPMS shapefile “hpms2016” in your package. The roads around LA in that shapefile look MUCH better than “hpms2013\_lcc”. We will use “hpms2016” to generate onroad surrogates for processing 2014-2016 onroad emissions.