武测译文 Pub Date : 2022-10-13 DOI: 10.1080/10095020.2022.2088302

Yuying Wu, Yijing Li

引用次数: 1

An investigation of the temporality of OpenStreetMap data contribution activities 对OpenStreetMap数据贡献活动的时效性的调查

武测译文 Pub Date : 2022-10-07 DOI: 10.1080/10095020.2022.2124127

T. Novack, Leonard Vorbeck, A. Zipf

引用次数: 3

Isolating the direct and indirect impacts of urbanization on vegetation carbon sequestration capacity in a large oasis city: evidence from Urumqi, China 城市化对大型绿洲城市植被固碳能力的直接和间接影响——来自乌鲁木齐的证据

武测译文 Pub Date : 2022-09-30 DOI: 10.1080/10095020.2022.2118624

Q. Zhuang, Z. Shao, D. Li, Xiao Huang, O. Altan, Shixin Wu, Yuzhen Li

{"title":"Isolating the direct and indirect impacts of urbanization on vegetation carbon sequestration capacity in a large oasis city: evidence from Urumqi, China","authors":"Q. Zhuang, Z. Shao, D. Li, Xiao Huang, O. Altan, Shixin Wu, Yuzhen Li","doi":"10.1080/10095020.2022.2118624","DOIUrl":"https://doi.org/10.1080/10095020.2022.2118624","url":null,"abstract":"ABSTRACT Oasis cities are deeply affected by human activities in arid and semi-arid regions. Vegetation is an important repository in the carbon cycle of oasis urban ecosystems. The continuous expansion of urban has a disproportionate impact on the carbon sequestration capacity of vegetation. Till now, studies have been conducted to quantify the impact of urbanization on vegetation carbon sequestration capacity, the mechanism of such impact remains unclear and lacks systematic investigations, especially in oasis urban. Understanding the impact mechanism greatly benefits the sustainable development of oasis urban and regional carbon neutrality. To fill this knowledge gap, we design a theoretical framework to analyze the impact of urbanization on vegetation carbon sequestration capacity by isolating the direct and indirect impacts in Urumqi, China. Some results based on Landsat images indicated that the Impervious Surface Areas (ISAs) expanded by 436.98 km2 during 2000 – 2019. The Net Primary Productivity (NPP) calculated using the Vegetation Photosynthesis Model (VPM) was directly caused by the loss of 51.45 Gg C (1 Gg = 109 g). Another important finding proved that the direct carbon loss caused by urbanization did not change the upward trend of the total carbon sequestration capacity of vegetation, but only slowed down this upward trend by 20.86%. Our results provide new insights into urban vegetation carbon sinks and contribute to a better understanding of the uncertainty of urbanization toward carbon neutrality. This study will provide scientific data support and suggestions for the sustainable development of oasis cities and the regional carbon budget.","PeriodicalId":58518,"journal":{"name":"武测译文","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47158094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Identification of international trade patterns of agricultural products: the evolution of communities and their core countries 农产品国际贸易模式的识别:社区及其核心国家的演变

武测译文 Pub Date : 2022-09-30 DOI: 10.1080/10095020.2022.2122875

Jiaxin Dong, Siwei Li, Lina Huang, Jing He, Wenping Jiang, F. Ren, Yujing Wang, Jiang Sun, H. Zhang

引用次数: 1

China’s poverty assessment and analysis under the framework of the UN SDGs based on multisource remote sensing data 基于多源遥感数据的联合国可持续发展目标框架下的中国贫困评估与分析

武测译文 Pub Date : 2022-09-30 DOI: 10.1080/10095020.2022.2108346

Mengjie Wang, Yanjun Wang, Fei Teng, Shaochun Li, Yunhao Lin, Hengfan Cai

引用次数: 1

Spatial diffusion processes of Gelugpa monasteries of Tibetan Buddhism in Tibetan areas of China utilizing the multi-level diffusion model 利用多层次扩散模型研究中国藏区藏传佛教格鲁派寺院的空间扩散过程

武测译文 Pub Date : 2022-09-30 DOI: 10.1080/10095020.2022.2108345

Zihao Chao, Yaolong Zhao, Subin Fang, Danying Chen

引用次数: 0

China’s larch stock volume estimation using Sentinel-2 and LiDAR data 利用Sentinel-2和LiDAR数据估算中国落叶松蓄积量

武测译文 Pub Date : 2022-09-20 DOI: 10.1080/10095020.2022.2105754

Tao Yu, Y. Pang, Xiaojun Liang, W. Jia, Yu Bai, Yilin Fan, Dongsheng Chen, Xianzhao Liu, G. Deng, Chonggui Li, Xiangnan Sun, Zhidong Zhang, Weiwei Jia, Zhonghua Zhao, Xiao Wang

{"title":"China’s larch stock volume estimation using Sentinel-2 and LiDAR data","authors":"Tao Yu, Y. Pang, Xiaojun Liang, W. Jia, Yu Bai, Yilin Fan, Dongsheng Chen, Xianzhao Liu, G. Deng, Chonggui Li, Xiangnan Sun, Zhidong Zhang, Weiwei Jia, Zhonghua Zhao, Xiao Wang","doi":"10.1080/10095020.2022.2105754","DOIUrl":"https://doi.org/10.1080/10095020.2022.2105754","url":null,"abstract":"ABSTRACT Forest Stock Volume (FSV) is one of the key indicators in forestry resource investigation and management on local, regional, and national scales. Limited by the saturation problems of optical satellite remote-sensing imagery in the retrieving of stock volume, and the high cost of Light Detection And Ranging (LiDAR) data, it is still challenging to estimate FSV in a large area using single-sensor remote-sensing data. In this paper, a method integrated multispectral satellite imagery and LiDAR data was developed to map stock volume in a large area. A random forest model was adopted to estimate the stock volume of larch forest in China based on the training samples from the Airborne Laser Scanning (ALS)-derived stock volume and corresponding Sentinel-2 imagery. Validation using National Forest Inventory (NFI) data, ALS-derived stock volume and ground investigation data demonstrated that the estimated stock volume had a high accuracy (R2 = 0.59, RMSE = 59.69 m3/ha, MD = 39.96 m3/ha when validated with NFI data; R2 ranged from 0.77 to 0.85, RMSE ranged from 38.68 m3/ha to 67.38 m3/ha, MD ranged from 24.90 m3/ha to 37.27 m3/ha when validated with ALS stock volume; R2 = 0.42, RMSE = 79.10 m3/ha, MD = 62.06 m3/ha when validated with field investigation data). Results of this paper indicated the applicability of estimating stock volume of larch forest in a large area by combining Sentinel-2 data and airborne LiDAR data.","PeriodicalId":58518,"journal":{"name":"武测译文","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48231024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Quality monitoring of real-time GNSS precise positioning service system 实时GNSS精确定位服务系统质量监控

武测译文 Pub Date : 2022-09-15 DOI: 10.1080/10095020.2022.2070554

Run Ji, Xinyuan Jiang, Xinghan Chen, Huizhong Zhu, M. Ge, F. Neitzel

{"title":"Quality monitoring of real-time GNSS precise positioning service system","authors":"Run Ji, Xinyuan Jiang, Xinghan Chen, Huizhong Zhu, M. Ge, F. Neitzel","doi":"10.1080/10095020.2022.2070554","DOIUrl":"https://doi.org/10.1080/10095020.2022.2070554","url":null,"abstract":"ABSTRACT The Real-Time Global Navigation Satellite System (GNSS) Precise Positioning Service (RTPPS) is recognized as the most promising system by providing precise satellite orbit and clock corrections for users to achieve centimeter-level positioning with a stand-alone receiver in real-time. Although the products are available with high accuracy almost all the time, they may occasionally suffer from unexpected significant biases, which consequently degrades the positioning performance. Therefore, quality monitoring at the system-level has become more and more crucial for providing a reliable GNSS service. In this paper, we propose a method for the monitoring of real-time satellite orbit and clock products using a monitoring station network based on the Quality Control (QC) theory. The satellites with possible biases are first detected based on the outliers identified by Precise Point Positioning (PPP) in the monitoring station network. Then, the corresponding orbit and clock parameters with temporal constraints are introduced and estimated through the sequential Least Square (LS) estimator and the corresponding Instantaneous User Range Errors (IUREs) can be determined. A quality indicator is calculated based on the IUREs in the monitoring network and compared with a pre-defined threshold. The quality monitoring method is experimentally evaluated by monitoring the real-time orbit and clock products generated by GeoForschungsZentrum (GFZ), Potsdam. The results confirm that the problematic satellites can be detected accurately and effectively with missed detection rate and false alarm rate . Considering the quality alarms, the PPP results in terms of RMS of positioning differences with respect to the International GNSS Service (IGS) weekly solution in the north, east and up directions can be improved by 12%, 10% and 27%, respectively.","PeriodicalId":58518,"journal":{"name":"武测译文","volume":"26 1","pages":"1 - 15"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46237446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The ATL08 as a height reference for the global digital elevation models ATL08作为全球数字高程模型的高度参考

武测译文 Pub Date : 2022-09-07 DOI: 10.1080/10095020.2022.2087108

Nahed Osama, Z. Shao, Yue Ma, Jianguo Yan, Yewen Fan, Shaimaa Magdy Habib, Mohamed Freeshah

引用次数: 1

Market analysis of the relationship between Brazilian Federal Government and the geospatial industry 巴西联邦政府与地理空间产业关系的市场分析

武测译文 Pub Date : 2022-09-07 DOI: 10.1080/10095020.2022.2094288

A. A. Gavlak, L. Barrozo

引用次数: 1

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