------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset: Photogrammetric Point Cloud Trees 2. Author Information: Principal Investigator Contact Information Name: Bogdan Strimbu Institution: Oregon State University Address: 3100 Jefferson Way, Corvallis OR 97333 Email: bogdan.strimbu@oregonstate.edu Associate or Co-investigator Contact Information Name: Rong Fang Institution: Oregon State University` Address: 3100 Jefferson Way Email:rong.fang@oregonstate.edu 3. Date of data collection (single date, range, approximate date): 20140301-20140530 4. Geographic location of data collection (where was data collected?): Vernon Parish, Louisiana, USA 5. Information about funding sources that supported the collection of the data: ITRS grant#LEQSF(2012-2015)-RD-B-04 McIntire-Stennis grant: OREZ-FERM-875 -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Links to publications that cite or use the data: Rong Fang and Bogdan Strimbu (2017) Photogrammetric point cloud trees. Mathematical and Computational Forestry & Natural-Resource Sciences 9(2) Abstract: This note describes the point clouds representing the stem of three loblolly pines (Pinus taeda Lindl.) from west-central Louisiana reconstructed with terrestrial photogrammetry. After capturing the images needed for the 3D rendering, we cut the trees down and measured their diameters at breast height and at every meter along the stem starting at 1 m above the ground. The diameters measured in the field were stored as ASCII files. The reconstructed models reached over 50% of the relative height – the proportion of the stem on which the majority of the merchantable volume is located. For each tree, two files were produced, a point cloud and a mesh data, to represent the 3D stem and some branches. The point cloud was stored in the LAS format and the mesh in the DXF format. Diameter at breast height was marked on all trees by red rings. The files describing the three trees provide a calibrated dataset that can be used for development of taper models, testing and calibration of segmentation algorithms, and identification of products that can be obtained from a stem. 2. This data was not derived from another source. This data is published under a CC0 license (public domain) --------------------- DATA & FILE OVERVIEW --------------------- 1. File Overview The dataset contains three types of files: ASCII, las, and dxf. The ASCII file are standard txt files that can be read with any text editor, including internet browsers. The las files are the standard files (the abbreviation comes from laser) produced by the American Society of Photogrammetry and Remote Sensing, initially for lidar but now common to any point cloud. A las file can be opened with a variety of programs that recognize a 3D format, some commercial, such as ERDAS, ENVI, QTM, Matlab, or AutoDesk, and some free, such as PointVue, Cloud Compare, Fusion, or QTReader. The dxf files is the abbreviation of the Drawing Exchange Format, and is a Computer Aid Design file developed by AutoDesk specifically to allow broad operability among programs. Dxf files can be opened with a variety of programs, similar to las files, some commercial, such as AutoDesk, Corel Draw, TurboCAD, or Matlab, other free, such as Meshlab, DWGSee, or DXF Viewer. 2. File List A. Filename: Tree1_field.txt Short description: The diameters measured along the stem for tree #1 Data dictionary: The file contains two columns called: Length_m and Diameter_mm. The Diameter_mm represents the diameter measured in mm The Length_m represents the length measured in m B. Filename: Tree2_field.txt Short description: The diameters measured along the stem for tree #2 Data dictionary: The file contains two columns called: Length_m and Diameter_mm. The Diameter_mm represents the diameter measured in mm The Length_m represents the length measured in m C. Filename: Tree3_field.txt Short description: The diameters measured along the stem for tree #3 Data dictionary: The file contains two columns called: Length_m and Diameter_mm. The Diameter_mm represents the diameter measured in mm The Length_m represents the length measured in m D. Filename: Tree1_PPC.las Short description: Photogrammetric point cloud for tree #1. The point cloud is scaled and all points are RGB colored E. Filename: Tree2_PPC.las Short description: Photogrammetric point cloud for tree #2 The point cloud is scaled and all points are RGB colored F. Filename: Tree3_PPC.las Short description: Photogrammetric point cloud for tree #3 The point cloud is scaled and all points are RGB colored G. Filename: Tree1_mesh.dxf Short description: The stem of tree#1 described with a scaled RGB colored mesh H. Filename: Tree2_mesh.dxf Short description: The stem of tree#2 described with a scaled RGB colored mesh I. Filename: Tree3_mesh.dxf Short description: The stem of tree#3 described with a scaled RGB colored mesh 3. Relationship between files: The files A,D and G describe the stem of the tree #1 with different type of data: ground (file A), points (file D), and triangles (file G) The files B,E and H describe the stem of the tree #2 with different type of data: ground (file B), points (file E), and triangles (file H) The files C,F and I describe the stem of the tree #3 with different type of data: ground (file C), points (file F), and triangles (file I) 4. Additional related data collected that was not included in the current data package: 5. Are there multiple versions of the dataset? NO -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: The diameter measurements in the field were executed with a caliper that has the precision of 1 mm. The length in the field were measured with a measuring tape with precision of 1 mm. The images were collected with a Nikon D3200 camera equipped with a Nikkor AF-S DX VR 18–55 mm zoom lens (aperture3.5–5.6). Relative location of the trees was recorded using a Garmin eTrex. 2. Methods for processing the data: The method of processing the images were described in the article "Rong F and Strimbu BM 2017 Stem Measurements and Taper Modeling Using Photogrammetric Point Clouds. Remote Sensing 9 (7), 716-737" 3. Instrument- or software-specific information needed to interpret the data: The images were processed with Agisoft Photoscan version 1.2. 4. People involved with sample collection, processing, analysis and/or submission: The images were colected by Blaine Blister and Austin Watkins form Louisiana Tech University The diameters and lengths were measured by Isaac Moore from Louisiana Tech University