基于变化更新的中东欧国家森林覆盖制图

doi:10.11707/j.1001-7488.LYKX20220097

Abstract

Abstract:

Objective: The Central and Eastern European Countries (CEEC) which are the Belt and Road initiative are important forces in Europe and link Asia and Europe. Forest resources monitoring helps understand the forest development in CEEC, and is the basis for forestry cooperation between China and CEEC. Method: Taking CEEC as the study area, the cloudless images of CEEC in the growing season in 2020 are obtained based on the Google Earth Engine platform. The images are classified by random forest algorithm. The forest change information is obtained by the continue change detection and classification (CCDC) algorithm, and updated classification results by this information. Finally, the land cover results of CEEC are obtained. The results are evaluated and verified through the land use/cover area frame survey (LUCAS) data, visual interpretation data, and Food and Agricultural Organization of the United Nations statistical data (FAOSTAT). Finally, the mapping results are analyzed through Google high-resolution images. Result: Results show that our map obtained the users’ accuracy for forest type is 0.930 and 0.911 which validated by the LUCAS and visual interpretation data, the producer’s accuracy for forest type is 0.860 and 0.956, respectively, overall accuracy is 0.810 and 0.881, respectively. The accuracy of our map is better than the GlobeLand30 2020 products, in which the user’s accuracy for forest type is 0.920 and 0.900, while the producer’s accuracy for forest type is 0.690 and 0.840, respectively, and the overall accuracy is 0.700 and 0.832. According to the research results, the overall forest coverage rate of CEEC is 39.6%, this result is closer to the FAOSTAT result (40.0%) than the GlobeLand30 2020 result (34.4%). The final mapping results are richer in detail than the GlobeLand30 2020 product and can more accurately reflect the distribution characteristics of forests. In 2020, the forest cover of CEEC is rich in the north, southeast, and southwest, and less in the south. Estonia, Latvia, Slovenia, Montenegro, and other countries have rich forest distribution, while Poland, Hungary, and other countries have relatively rare forest distribution. Conclusion: This study has developed a forest cover mapping method based on change detection and update according to the application requirements of forest cover in CEEC and obtain a 2020 LC map. The product has high precision and provides a new reference for regional forest cover mapping research. This result is helpful in understanding the forest cover situation in CEEC.

Key words: Central and Eastern European Countries (CEEC), Google Earth Engine (GEE), forest resource, remote sensing monitoring

CLC Number:

S771.8

Chunling Wang,Kaiyuan Shi,Yong Pang,Shili Meng. Forest Cover Mapping of Central and Eastern European Countries Based on Change Detection and Update[J]. Scientia Silvae Sinicae, 2024, 60(5): 116-126.

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分类产品 Land cover products	发布机构 Issued organization	数据来源 Data source	产品年份 Production year	空间分辨率 Spatial resolution/m
GlobeLand30	国家基础地理信息中心 National Geomatics Center of China	Landsat TM/ETM+/OLI HJ-1 A/B	2000，2010，2020	30
GLC_FCS30	中国科学院 Chinese Academy of Sciences	Landsat TM/ETM+	2015，2020	30
The Land Cover Map of Europe 2017	欧洲航天局 European Space Agency	Sential-2	2017	10

年份 Year	耕地 Cropland	森林 Forest	草地 Grass	灌木 Shrub	湿地 Wetland	水体 Water	人造地表 Impervious	裸地 Bare land	合计 Total
2000	132 587	90 865	26 799	12 272	2 601	4 058	12 608	640	282 430
2020	107 706	121 412	29 644	8 563	1 930	4 435	7 854	886	282 430

类别 Category	耕地 Cropland	森林 Forest	草地 Grass	灌木 Shrub	湿地 Wetland	水体 Water	人造地表 Impervious	裸地 Bare land	合计 Total	用户精度 User accuracy
耕地 Cropland	101 568	10 412	9 704	4 656	386	503	2 550	276	130 055	0.781
森林 Forest	2 149	103 879	2 789	1 934	217	398	654	77	112 097	0.930
草地 Grass	2 510	2 273	13 632	778	29	10	104	78	19 414	0.700
灌木 Shrub	329	1 828	468	541	14	17	46	22	3 265	0.702
湿地 Wetland	68	643	288	221	1 250	201	19	24	2 714	0.461
水体 Water	16	86	62	50	27	3 235	2	34	3 512	0.920
人造地表 Impervious	1 061	2 256	2 651	339	7	61	4 478	328	11 181	0.401
裸地 Bare land	5	35	50	44	0	10	1s	47	192	0.245
合计 Total	107 706	121 412	29 644	8 563	1 930	4 435	7854	886	282 430
生产精度 Producer accuracy	0.943	0.860	0.500	0.060	0.650	0.730	0.570	0.050		0.810

类别 Category	耕地 Cropland	森林 Forest	草地 Grass	灌木 Shrub	湿地 Wetland	水体 Water	人造地表 Impervious	合计 total	用户精度 User accuracy
耕地 Cropland	797	12	17	21	1	1	10	859	0.928
森林 Forest	29	607	15	13	0	0	2	666	0.911
草地 Grass	24	8	33	17	0	0	0	82	0.402
灌木 Shrub	9	6	2	10	0	0	0	27	0.370
湿地 Wetland	5	2	1	3	16	2	0	29	0.552
水体 Water	0	0	1	0	1	25	0	27	0.926
人造地表 Impervious	7	0	2	2	0	0	59	70	0.831
合计 Total	871	635	71	66	18	28	71	1 760
生产精度 Producer accuracy	0.915	0.956	0.465	0.152	0.889	0.893	0.831		0.880

国家 Country	本文研究结果 This paper（%）	GLobaLand30 2020（%）	FAOSTAT （%）
阿尔巴尼亚Albania	39.0	51.1	29.5
爱沙尼亚Estonia	56.5	45.5	59.7
保加利亚Bulgaria	40.1	34.2	41.1
波黑Bosnia and Herzegovina	64.5	50.0	54.2
波兰Poland	34.8	30.8	35.1
黑山Montenegro	56.4	66.6	71.6
捷克Czech	38.8	25.7	41.7
克罗地亚Croatia	47.9	37.2	50.0
拉脱维亚Latvia	56.5	43.3	51.0
立陶宛Lithuania	36.3	34.4	34.4
罗马尼亚Romania	34.5	20.2	34.3
马其顿Macedonia	42.7	62.1	43.7
塞尔维亚Serbia	36.0	36.1	35.7
斯洛伐克Slovakia	46.8	39.2	49.4
斯洛文尼亚Slovenia	65.6	58.2	68.0
匈牙利 Hungary	21.9	20.0	26.6
总计 Total	39.6	34.4	40.0

Forest Cover Mapping of Central and Eastern European Countries Based on Change Detection and Update

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