Data provided by National Institute of Standards and Technology
Design files and data for NIST Standard Reference Material (SRM) 2169, Scale and Distortion Standard for Forensic Topographic Surface Measurement. The designs for the SRM chip
and the post are provided in [FreeCAD](freecad.org) format, and in STEP format. A fabrication drawing is included for the SRM post.
About this Dataset
Updated: 2026-09-04
Metadata Last Updated:
2026-07-23 00:00:00
Date Created:
N/A
Data Provided by:
Dataset Owner:
N/A
| Title | Design Data for NIST SRM 2169: Scale and Distortion Standard for Forensic Topographic Surface Measurement |
|---|---|
| Description | Design files and data for NIST Standard Reference Material (SRM) 2169, Scale and Distortion Standard for Forensic Topographic Surface Measurement. The designs for the SRM chip and the post are provided in [FreeCAD](freecad.org) format, and in STEP format. A fabrication drawing is included for the SRM post. |
| Modified | 2026-07-23 00:00:00 |
| Publisher Name | National Institute of Standards and Technology |
| Contact | mailto:[email protected] |
| Keywords | forensic topographic imaging system; lateral amplification factor (scale) calibration; lateral mapping deviation (distortion) calibration; standard reference material |
{
"identifier": "ark:\/88434\/mds2-4261",
"accessLevel": "public",
"contactPoint": {
"hasEmail": "mailto:[email protected]",
"fn": "Ulf Griesmann"
},
"programCode": [
"006:045"
],
"landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-4261",
"title": "Design Data for NIST SRM 2169: Scale and Distortion Standard for Forensic Topographic Surface Measurement",
"description": "Design files and data for NIST Standard Reference Material (SRM) 2169, Scale and Distortion Standard for Forensic Topographic Surface Measurement. The designs for the SRM chip\nand the post are provided in [FreeCAD](freecad.org) format, and in STEP format. A fabrication drawing is included for the SRM post.",
"language": [
"en"
],
"distribution": [
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/Post-V5_and_SRM2169-V3.png",
"format": "Portable network graphics",
"description": "CAD model image of SRM 2169 consisting of post and ceramic chip with cone grid.",
"mediaType": "image\/png",
"title": "Post-V5_and_SRM2169-V3"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/README.md",
"format": "Markdown",
"description": "README file with a description of the files in this distribution and their purpose.",
"mediaType": "text\/x-web-markdown",
"title": "README"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/Post_for_SRM2169_V5.pdf",
"format": "Portable document format",
"description": "Drawing of the post for SRM 2169 with the major dimensions and specifications. This is not a complete fabrication drawing, but a summary of the information in the STEP file for the post.",
"mediaType": "application\/pdf",
"title": "Post_for_SRM2169_V5"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/Post_for_SRM2169_V5.step",
"format": "Standard for the Exchange of Product model data (STEP)",
"description": "A 3D model of the post for SRM 2169 in ISO 10303-21 STEP format.",
"mediaType": "application\/octet-stream",
"title": "Post_for_SRM2169_V5"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/README.pdf",
"format": "Portable document format",
"description": "README file for the files in the distribution in portable document format.",
"mediaType": "application\/pdf",
"title": "README"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/SRM2169_V3.png",
"format": "Portable network graphics",
"description": "An image of the SRM 2169 cone grid chip.",
"mediaType": "image\/png",
"title": "SRM2169_V3"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/SRM2169_V3.step",
"format": "Standard for the Exchange of Product model data",
"description": "The design of the cone grid chip of SRM 2169 in ISO 10303-21 (STEP) format.",
"mediaType": "application\/octet-stream",
"title": "SRM2169_V3"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/SRM2169_V3.FCStd",
"format": "FreeCAD format (freecad.org)",
"description": "Design of the SRM 2169 ceramic chip with cone grid in FreeCAD format.",
"mediaType": "application\/octet-stream",
"title": "SRM2169_V3"
},
{
"downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-4261\/Post_for_SRM2169_V5.FCStd",
"format": "FreeCAD (freecad.org)",
"description": "Design of the post for SRM 2169 in FreeCAD format.",
"mediaType": "application\/octet-stream",
"title": "Post_for_SRM2169_V5"
}
],
"bureauCode": [
"006:55"
],
"modified": "2026-07-23 00:00:00",
"publisher": {
"@type": "org:Organization",
"name": "National Institute of Standards and Technology"
},
"theme": [
"Metrology:Dimensional metrology",
"Forensic Science:Firearms and Toolmarks"
],
"keyword": [
"forensic topographic imaging system; lateral amplification factor (scale) calibration; lateral mapping deviation (distortion) calibration; standard reference material"
]
}
