DIGGSml
Update Codelist:classificationCode
We are seeking comments/recommendations on updating the lithology codelist as shown below. This post is also kicking off the Codelist Updates project page where we will be keeping track of the development process.
diggs:Lithology/diggs:classificationCode
| Code | Name | Description | Data type | UOMType | Authority |
|---|---|---|---|---|---|
| SP-SM | Poorly-graded sand with silt | Poorly-graded sand with silt | USCS | ||
| GW-GC | Well-graded gravel with clay (or silty clay) | Well-graded gravel with clay (or silty clay) | USCS | ||
| CL | Lean clay | Lean clay | USCS | ||
| GP-GM | Poorly-graded gravel with silt | Poorly-graded gravel with silt | USCS | ||
| CH | Fat clay | Fat clay | USCS | ||
| GC | Clayey gravel | Clayey gravel | USCS | ||
| GM | Silty gravel | Silty gravel | USCS | ||
| GP-GC | Poorly-graded gravel with clay (or silty clay) | Poorly-graded gravel with clay (or silty clay) | USCS | ||
| CL-ML | Silty clay | Silty clay | USCS | ||
| SP-SC | Poorly-graded sand with clay | Poorly-graded sand with clay | USCS | ||
| GW-GM | Well-graded gravel with silt | Well-graded gravel with silt | USCS | ||
| GP | Poorly-graded gravel | Poorly-graded gravel | USCS | ||
| SW-SM | Well-graded sand with silt | Well-graded sand with silt | USCS | ||
| SW | Well-graded sand | Well-graded sand | USCS | ||
| GC-GM | Silty, clayey gravel | Silty, clayey gravel | USCS | ||
| GW | Well-graded gravel | Well-graded gravel | USCS | ||
| ML | Silt | Silt | USCS | ||
| OH | Organic clay | Organic clay | USCS | ||
| SC-SM | Silty, clayey sand | Silty, clayey sand | USCS | ||
| MH | Elastic silt | Elastic silt | USCS | ||
| SC | Clayey sand | Clayey sand | USCS | ||
| OL | Organic clay | Organic clay | USCS | ||
| SM | Silty sand | Silty sand | USCS | ||
| SW-SC | Well-graded sand with clay | Well-graded sand with clay | USCS | ||
| SP | Poorly-graded sand | Poorly-graded sand | USCS | ||
| LFS | Loamy fine sand | Loamy fine sand | USDA | ||
| SIC | Silty clay | Silty clay | USDA | ||
| COS | Coarse sand | Coarse sand | USDA | ||
| LFS | Loam | Loam | USDA | ||
| LCOS | Loamy coarse sand | Loamy coarse sand | USDA | ||
| SC_ | Sandy clay | Sandy clay | USDA | ||
| CL_ | Clay loam | Clay loam | USDA | ||
| SL | Sandy loam | Sandy loam | USDA | ||
| COSL | Coarse sandy loam | Coarse sandy loam | USDA | ||
| S | Sand | Sand | USDA | ||
| VFS | Very fine sand | Very fine sand | USDA | ||
| FS | Fine sand | Fine sand | USDA | ||
| LS | Loamy sand | Loamy sand | USDA | ||
| SICL | Silty clay loam | Silty clay loam | USDA | ||
| SCL | Sandy clay loam | Sandy clay loam | USDA | ||
| FSL | Fine sandy loam | Fine sandy loam | USDA | ||
| VFSL | Very fine sandy loam | Very fine sandy loam | USDA | ||
| SIL | Silt loam | Silt loam | USDA | ||
| LVFS | Loamy very fine sand | Loamy very fine sand | USDA | ||
| SI | Silt | Silt | USDA | ||
| A-1-a | Gravel and/or stone fragments | Gravel and/or stone fragments | AASHTO | ||
| A-1-b | Gravel and/or stone fragments with sand | Gravel and/or stone fragments with sand | AASHTO | ||
| A-3 | Fine sand | Fine sand | AASHTO | ||
| A-3-a | Coarse and fine sand | Coarse and fine sand | ODOT | ||
| A-2-4 | Gravel and/or stone fragments with sand and silt | Gravel and/or stone fragments with sand and silt | AASHTO | ||
| A-2-5 | Gravel and/or stone fragments with sand and silt | Gravel and/or stone fragments with sand and silt | AASHTO | ||
| A-2-6 | Gravel and/or stone fragments with sand, silt and clay | Gravel and/or stone fragments with sand, silt and clay | AASHTO | ||
| A-2-7 | Gravel and/or stone fragments with sand, silt and clay | Gravel and/or stone fragments with sand, silt and clay | AASHTO | ||
| A-4 | Silty soils | Silty soils | AASHTO | ||
| A-4-a | Sandy silt | Sandy silt | ODOT | ||
| A-4-b | Silt | Silt | ODOT | ||
| A-5 | Elastic silt and clay | Elastic silt and clay | AASHTO | ||
| A-6 | Clayey soils | Clayey soils | AASHTO | ||
| A-6-a | Silt and clay | Silt and clay | ODOT | ||
| A-6-b | Silty clay | Silty clay | ODOT | ||
| A-7-5 | Elastic clay | Elastic clay | AASHTO | ||
| A-7-6 | Clay | Clay | AASHTO | ||
| A-8 | Organic soils | Organic soils | AASHTO | ||
| A-8-a | Organic silt | Organic silt | ODOT | ||
| A-8-b | Organic clay | Organic clay | ODOT | ||
| sod_and_topsoil | Sod and topsoil | Sod and topsoil | ODOT | ||
| pavement_or_base | Pavement or base | Pavement or base | ODOT | ||
| uncontrolled_fill | Uncontrolled fill | Uncontrolled fill | ODOT | ||
| bouldery_zone | Bouldery zone | Bouldery zone | ODOT | ||
| peat | Peat | Peat | ODOT |
This looks like a good starting point. If there are other classification systems or if someone notes a problem with one of these, please provide a comment so that the committee can review this codelist and make appropriate modifications.
Should we change the name from Update:lithology to Update Codelist:classificationCode or just Update:classificationCode if it’s in some sort of group of all codelists?
I think the lithology may be confusing? May be a lot of codelists related to lithology (rock type, geoelogy?)
The AGS in the UK has a list for lithology here http://www.agsdataformat.com/User/pickv4.php?abbr=GEOL_LEG (requires login to website which is free). I won't add them to the list above I don't think they will "merge together" well as the UK and US have different views on classification systems. But this may be of interest to others. If the AGS adopt DIGGS then they will link to their list rather for the UK rather than trying to come up with a list for worldwide usage.
Roger, you make a good point here. Any user or entity can link their own lists and for AGS this may be the best approach. We should focus on this being a good general list for those that do not have their own definitions already defined and those that are already using systems similar or common to those used in the US as reflected here.
I believe our Authority needs to be more specific. USCS could be field classification vs lab classification. They are fundamentally similar but different systems. They have all of the same USCS symbols except the lab classification has a CL-ML classification. So, we could duplicate all the codes except CL-ML and then have 2 different Authorities, ASTM D2487 and ASTM D2488.
As we were discussing on the DIGGS call this am... should the "Code" require an "Authority"? issues such as USCS CL (Lean Clay) and USDA CL_ (Clayey Loam). If we required the Authority, we would not have to have CL and CL_
Will it be confusing or incorrect if you have to jump between ODOT and AASHTO fro various classifications? A-6.. A-6a and A-6b . (I should also do some research on how they tell between silt and clay and silty clay) Is authority a required field?
Yes - I believe it is confusing and potentially misleading. It causes problems for users, software developers, etc. If all 50 state DOTs decide to disregard the standards then there is little point in having the standard in the first place other than for commercial work, which then means you still have the tail wagging the dog (e.g. DOT's dictating a different way of doing things similar to the problem you have with DOT's mandating gINT project files must be provided which requires consultants to change their process for each DOT).
There is a reason why there are ASTM standards and AASHTO standards, Individual states doing their own thing is problematic and lessens the value of the data, and potentially provides misleading data in scenarios where people do not know that ODOT's classification system is different than MODOT's classification which is different than LADOT, etc. This also means that doing any data mining is unreliable because the differences in classification using these systems.