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FOREST RESOURCES WANAGEMENT ›› 2019›› Issue (4): 117-123.doi: 10.13466/j.cnki.lyzygl.2019.04.017

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Applications of GNSS RTK Technology to Positioning Forest Location and Measuring Microtopography

SHI Junjie1(), CHEN Zhongzhen1, MENG Lingyu1, LI Yongxiang2, LI Yongning1()   

  1. 1. College of Forestry,Agricultural University of Hebei/Hebei Province Key Laboratory of Forest Trees Germplasm Resources and Forest Protection, Baoding 071000, China
    2. Mulanweichang National Forest Farm Management Bureau of Hebei Province, Weichang 068450, China
  • Received:2019-02-28 Revised:2019-04-12 Online:2019-08-28 Published:2020-10-20
  • Contact: LI Yongning E-mail:sjj410521@163.com;yongninghao@163.com

Abstract:

GNSS RTK can provide real-time,high-precision positioning information and has broad application prospects in forests.We tried to measure the position of the tree using RTK in several different forest types.In addition,the tree distribution pattern and microtopography were measured on the natural forest of Larix principis-rupprechtii in Longtoushan Forest Farm.Results showed that:1) Crown density is one of the main factors affecting the availability of RTK in forests.The lower the canopy closure,the higher availability of RTK.2) Accuracy and efficiency can be improved by RTK for plot setting.There are two ways to choose,one is “straight measurement lofting”,the other is “auxiliary measurement”.3) Compared with the electronic total station,the average point error of RTK is 0.143m,which fully meets the needs of the work.4) Using ArcGis to analyze the data measured by RTK,microtopography information such as slope and aspect can be obtained.

Key words: Larix principis-rupprechtii, positioning of trees, microtopography, RTK surveying, visibility analysis

CLC Number: