Sub-compartment Division and Interpretation of Tree Species Based on High-resolution Aerial Photos

doi:10.13466/j.cnki.lyzygl.2020.01.018

Abstract

Abstract:

This paper studied the sub-compartment division and tree species interpretation techniques of forest resources management inventory in Guangxi Gaofeng Forest Farm.The 0.2m spatial resolution CCD data were used,which were obtained by CAF-LiCHy Airborne Observation System.The interpretation signatures of common tree species were built.The sub-compartment boundaries were divided using visual interpretation,combined with the division results from previous forest inventory.Then,the dominant species was interpreted based on the interpretation signatures and the results were verified by filed data.According to the accuracy verification,the overall accuracy is 92.11% and Kappa coefficient is 0.90.The results indicate that high spatial resolution remote sensing data have high potential in sub-compartment division and tree species interpretation.

Key words: high-resolution aerial photo, forest resources management inventory, visual interpretation

CLC Number:

S757
S771.5

Hao XIONG, Yong PANG, Chungan LI, Huabing DAI. Sub-compartment Division and Interpretation of Tree Species Based on High-resolution Aerial Photos[J]. FOREST RESOURCES WANAGEMENT, 2020, 0(1): 143-150.

Figures/Tables 9

Tab.1

Fig.1

Fig.2

Tab.2

The interpretation signitures of tree species

优势树种(组)	色调	亮度	纹理	形状	空间位置	判读难易程度
杉木(Cunninghamia lanceolata)	深绿	偏暗	不规则	大小不一团块状	低山、丘陵	易判
马尾松(Pinus massoniana)	绿	中等	均匀、紧密	较大的球形	低山、丘陵	易判
荔枝(Litchi chinensis Sonn.)	浅绿	中等	紧密	较圆的团块状	道旁、居民点附近	可判
油茶(Camellia oleifera Abel)	蓝绿、灰绿	偏暗	均匀、紧密、沿等高线排列整齐	较小的团块状	低山、丘陵	可判
八角(Illicium verum Hook.f.)	黄绿	偏亮	均匀、紧密、排列整齐	较小的球形	低山、丘陵	易判
玉桂(Cinnamomum cassia Presl)	黄绿	偏亮	紧密	较大团块状	低山、丘陵	可判
红椎(Castanopsis hystrix Miq.)	绿	中等	稀疏	松散型	低山、丘陵	难判
西南桦(Betula alnoides Buch.-Ham.ex D.Don)	黄绿	偏亮	稀疏	松散团块状	低山、丘陵	可判
荷木(Schima superba Gardn.et Champ.)	绿	偏暗	紧密	团块状	带状分布作为防火林带	可判
巨尾桉(Eucalyptus grandis x urophylla)	灰绿、深绿	偏暗	均匀、紧密、沿等高线排列整齐	圆形颗粒状	低山、丘陵	易判
杂交相思(Acacia mangium×A.auriculiformis)	绿	中等	紧密	多角星形	道旁	易判
黑木相思(Acacia melanoxylon R.Br.)	黑绿	偏暗	稀疏	组合团块状	道旁	可判
火力楠(Michelia macclurei Dandy)	深绿、蓝绿	中等	紧密	不规则团块状	带状分布作为防火林带	易判
米老排(Mytilaria laosensis Lec.)	深绿、蓝绿	中等	紧密	大小不一较圆团块状	低山、丘陵	可判
椴树(Tilia tuan Szyszyl.)	深绿	偏暗	紧密	较圆的团块状	低山、丘陵	可判
竹类	浅绿	偏亮	稀疏	羽毛状	道旁、居民点附近	易判
其他软阔	多种	中等	有紧密有稀疏	不同的团块状	低山、丘陵	可判

Tab.2

Fig.3

Fig.4

Fig.5

Tab.4

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组件	技术指标
CCD相机	型号:IGI DigiCAM-H60
	图像尺寸(像素):8956×6708
	感光单元尺寸:6 μm
	空间分辨率:0.12 m(1000 m高度)
	焦距:50 mm
	最大光圈:3.5
	采样深度:16 bit
POS系统	型号:AEROcontrol/NovAtel OEM4
	IMU采样频率:256 Hz
	GNSS采样帧率:2 Hz
	可观测天顶角范围:5~55°

类型	制图精度	漏分误差	用户精度	错分误差
桉树	96.43	3.57	96.43	3.57
八角	88.89	11.11	100.00	0.00
火力楠	83.33	16.67	100.00	0.00
杉木	80.00	20.00	100.00	0.00
马尾松	100.00	0.00	100.00	0.00
新造未成林地	100.00	0.00	50.00	50.00
总体精度	92.11%	kappa系数	0.90