page_title: Diameter tape
hierarchical_section_title: Diameter tape
caption_attribution_description: English: How to measure diameter using a Diameter Tape
context_page_description: A diameter tape is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape has either metric or imperial measurements reduced by the value of π. This means the tape measures the diameter of the object. It is assumed that the cylinder object is a perfect circle. The diameter tape provides an approximation of diameter; most commonly used in dendrometry.
  Diameter tapes are usually made of cloth or metal, and on one side of the tape have diameter measurements and on the other standard measurements.
context_section_description: A diameter tape (D-tape) is a measuring tape used to estimate the diameter of a cylinder object, typically the stem of a tree or pipe. A diameter tape has either metric or imperial measurements reduced by the value of π. This means the tape measures the diameter of the object. It is assumed that the cylinder object is a perfect circle. The diameter tape provides an approximation of diameter; most commonly used in dendrometry.
  Diameter tapes are usually made of cloth or metal, and on one side of the tape have diameter measurements and on the other standard measurements (not reduced by π).
caption: Measurement of tree diameter at breast height, making sure that the tape is perfectly level and that the tape is not kinked, so as not to skew the reading of the diameter.
exif: {"Image ImageDescription": "", "Image Make": "NIKON", "Image Model": "COOLPIX L3", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "COOLPIX L3v1.2", "Image DateTime": "2008:03:26 04:30:18", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "356", "Image CustomRendered": "Normal", "Image ExposureMode": "Auto Exposure", "Image WhiteBalance": "Auto", "Image DigitalZoomRatio": "0", "Image FocalLengthIn35mmFilm": "47", "Image SceneCaptureType": "Standard", "Image GainControl": "None", "Image Contrast": "Normal", "Image Saturation": "Normal", "Image Sharpness": "Normal", "Image SubjectDistanceRange": "0", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "300", "Thumbnail YResolution": "300", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "3234", "Thumbnail JPEGInterchangeFormatLength": "5467", "EXIF ExposureTime": "2/523", "EXIF FNumber": "17/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "50", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2008:03:26 04:30:18", "EXIF DateTimeDigitized": "2008:03:26 04:30:18", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "2", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "7/2", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, auto mode", "EXIF FocalLength": "39/5", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1536", "EXIF ExifImageLength": "2048", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed"}