Grassland degradation, as a worldwide phenomenon, has economic and bio-conservation aspects. Degradation of mountain grasslands severely impacts the ecosystem stability in fragile mountain environments and may destroy habitats of many endemic and endangered species. One of the significant triggers of mountain grassland degradation, along with possible consequences of climate change, is massive overgrazing. Overgrazing may seriously influence the ecosystem since it results in plant composition changes, soil erosion, water regime disturbances, etc., up to the disappearance of the entire ecosystem. It is crucial to have a reliable and cost-effective instrument for the ecosystem assessment of remote and hardly accessible mountain areas supported with accurate methods of the vegetation parameters estimation since the vegetation cover is first to react to externally driven disturbances. The current study was conducted in Dzungarian Alatau Mountains, inhabited by the rare and endemic anuran amphibian Ranodon sibiricus, Kessler, 1886. The project of the Conservation International Foundation (CIF/326/21) was aimed at the strategy of this species conservation. The current study emphasises estimating the overgrazing risks for the amphibian population. More than two hundred ground measurements were done within the Upper Koksu Forestry and adjacent areas to provide representative data on the vegetation parameters. We tested a series of spectral indices related to vegetation biophysical parameters. We found DWSI, GrNDVI, IRECI and NDI45 indices to provide the best correlations and reasonable accuracy for remote measurements of above-ground biomass, grasscover and unpalatable grass content. Sentinel-2 data with the red-edge bands, in most cases, provided better performance. Our study confirmed the use of a single criterion (like above-ground biomass) might result in a serious underestimation of grassland degradation. Data obtained from field survey and satellite information analysis allowed the evaluation of the optimal grazing load for the Upper Koksu Forestry and provided recommendations for the Action Plan on the conservation of Ranodon sibiricus.
{"title":"Remote sensing as a tool of biological conservation and grassland monitoring in mountain areas of Southeastern Kazakhstan","authors":"D. Malakhov, Olga Dolnya","doi":"10.38094/jgier40169","DOIUrl":"https://doi.org/10.38094/jgier40169","url":null,"abstract":"Grassland degradation, as a worldwide phenomenon, has economic and bio-conservation aspects. Degradation of mountain grasslands severely impacts the ecosystem stability in fragile mountain environments and may destroy habitats of many endemic and endangered species. One of the significant triggers of mountain grassland degradation, along with possible consequences of climate change, is massive overgrazing. Overgrazing may seriously influence the ecosystem since it results in plant composition changes, soil erosion, water regime disturbances, etc., up to the disappearance of the entire ecosystem. It is crucial to have a reliable and cost-effective instrument for the ecosystem assessment of remote and hardly accessible mountain areas supported with accurate methods of the vegetation parameters estimation since the vegetation cover is first to react to externally driven disturbances. The current study was conducted in Dzungarian Alatau Mountains, inhabited by the rare and endemic anuran amphibian Ranodon sibiricus, Kessler, 1886. The project of the Conservation International Foundation (CIF/326/21) was aimed at the strategy of this species conservation. The current study emphasises estimating the overgrazing risks for the amphibian population. More than two hundred ground measurements were done within the Upper Koksu Forestry and adjacent areas to provide representative data on the vegetation parameters. We tested a series of spectral indices related to vegetation biophysical parameters. We found DWSI, GrNDVI, IRECI and NDI45 indices to provide the best correlations and reasonable accuracy for remote measurements of above-ground biomass, grasscover and unpalatable grass content. Sentinel-2 data with the red-edge bands, in most cases, provided better performance. Our study confirmed the use of a single criterion (like above-ground biomass) might result in a serious underestimation of grassland degradation. Data obtained from field survey and satellite information analysis allowed the evaluation of the optimal grazing load for the Upper Koksu Forestry and provided recommendations for the Action Plan on the conservation of Ranodon sibiricus.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130264573","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}
Cities in developing countries experience rapid expansion, which has a negative effect on the aesthetic value of the city. This paper thus examined urban metamorphosis and development control with the specific objectives of assessing the physical development between 1986 and 2018 and assessing residents’ perceptions of development control regulation and challenges of development control enforcement as regards to road setbacks in Ile-Ife, Osun state. Landsat imageries were used to examine changes in the physical development (built up) in Ile-Ife. A questionnaire and key informant interview were used to examine residents’ perceptions of development control regulation and challenges of development control enforcement. The result showed that built-up area increased from 2760.05ha (94.81%) between 1986 and 2002 to 6843.41ha (120.67%) between 2002 and 2018, and 9603.46ha (329.87%) between 1986 and 2018. Between 1986 and 2018, built up recorded annual magnitude and frequency of 9603.46ha and 600.22ha. The study revealed that 60% of the informants confirmed that the planning authorities were grappling with inadequate funds and inadequate technical and manpower which had resulted in their inability to undertake planning activities. The study concluded that rapid development had negatively affected development control in the study area. It is therefore recommended that the government should strengthen the planning authority, subsidize the cost of plan approval, and provide easy access to building permits.
{"title":"Geospatial Analysis of Urban Metamorphosis and implication on Development Control in Ile-Ife, Osun State, Nigeria","authors":"O. Ajala, Olaiya Remilekun, A. Olabamiji","doi":"10.38094/jgier30254","DOIUrl":"https://doi.org/10.38094/jgier30254","url":null,"abstract":"Cities in developing countries experience rapid expansion, which has a negative effect on the aesthetic value of the city. This paper thus examined urban metamorphosis and development control with the specific objectives of assessing the physical development between 1986 and 2018 and assessing residents’ perceptions of development control regulation and challenges of development control enforcement as regards to road setbacks in Ile-Ife, Osun state. Landsat imageries were used to examine changes in the physical development (built up) in Ile-Ife. A questionnaire and key informant interview were used to examine residents’ perceptions of development control regulation and challenges of development control enforcement. The result showed that built-up area increased from 2760.05ha (94.81%) between 1986 and 2002 to 6843.41ha (120.67%) between 2002 and 2018, and 9603.46ha (329.87%) between 1986 and 2018. Between 1986 and 2018, built up recorded annual magnitude and frequency of 9603.46ha and 600.22ha. The study revealed that 60% of the informants confirmed that the planning authorities were grappling with inadequate funds and inadequate technical and manpower which had resulted in their inability to undertake planning activities. The study concluded that rapid development had negatively affected development control in the study area. It is therefore recommended that the government should strengthen the planning authority, subsidize the cost of plan approval, and provide easy access to building permits.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121852602","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}
Ideal areas for housing developments that are, for the most part, sustainable, present critical issues in the planning and development of eco-friendly urban settlements. With this in mind and explicitly, Ede North LGA of Osun state was chosen as the case study where a methodological framework for a land suitability analysis was adopted to identify suitable lands for real estate development with sustainability as a focus in the realization of global UN goals. This present study falls within the framework of the Multi-Criteria Evaluation (MCE) analysis, which can be integrated into Geographic Information Systems (GIS) together with the Analytic Hierarchical Process (AHP), useful for decision making in site selection studies. For this purpose, computed relative weights from the pairwise comparisons (AHP) of 5 sub-models, i.e., terrain, environmental, socio-economic, available land and soil factors, were inserted into the suitability analysis function of GIS and combined in a ‘Weighted Sum’ overlay operation to produce a final suitability map on a scale of 1-5 with 5 being the highest preference. Lastly, the ‘Locate Region’ Spatial Analyst tool was applied to the final suitability map to locate three (3) optimum locations to site the estate developments. Conclusively, in view of the analysis and discoveries made in this research, finding optimum locations via the GIS–MCE based land suitability model for future housing development needs may prove highly resourceful. Hence, this study can likewise give a significant direction to future land use changes and practical and cost-effective arrangements in the urban areas where conditions are similar to those in Ede North LGA.
在大多数情况下，住房开发的理想区域是可持续的，这对生态友好型城市住区的规划和发展提出了关键问题。考虑到这一点，Osun州的Ede North LGA被选为案例研究，采用土地适宜性分析的方法框架，以确定适合房地产开发的土地，并将可持续性作为实现全球联合国目标的重点。本研究属于多标准评价(MCE)分析的框架，它可以与层次分析法(AHP)一起集成到地理信息系统(GIS)中，有助于选址研究中的决策制定。为此，从地形、环境、社会经济、可利用土地和土壤等5个子模型的两两比较(AHP)中计算出的相对权重被插入到GIS的适宜性分析功能中，并以“加权和”叠加操作相结合，生成1-5级的最终适宜性图，其中5为最高偏好。最后，将“定位区域”空间分析工具应用于最终的适宜性地图，以确定三(3)个房地产开发项目的最佳位置。最后，鉴于本研究的分析和发现，通过基于GIS-MCE的土地适宜性模型找到适合未来住房发展需求的最佳地点可能是非常明智的。因此，这项研究同样可以为未来土地利用的变化以及与埃德北LGA条件相似的城市地区的实际和成本效益安排提供重要方向。
{"title":"GIS-MCE based suitability analysis for sustainable estate development in Ede North LGA Osun State, Nigeria","authors":"Oluwasola Taiwo","doi":"10.38094/jgier30241","DOIUrl":"https://doi.org/10.38094/jgier30241","url":null,"abstract":"Ideal areas for housing developments that are, for the most part, sustainable, present critical issues in the planning and development of eco-friendly urban settlements. With this in mind and explicitly, Ede North LGA of Osun state was chosen as the case study where a methodological framework for a land suitability analysis was adopted to identify suitable lands for real estate development with sustainability as a focus in the realization of global UN goals. This present study falls within the framework of the Multi-Criteria Evaluation (MCE) analysis, which can be integrated into Geographic Information Systems (GIS) together with the Analytic Hierarchical Process (AHP), useful for decision making in site selection studies. For this purpose, computed relative weights from the pairwise comparisons (AHP) of 5 sub-models, i.e., terrain, environmental, socio-economic, available land and soil factors, were inserted into the suitability analysis function of GIS and combined in a ‘Weighted Sum’ overlay operation to produce a final suitability map on a scale of 1-5 with 5 being the highest preference. Lastly, the ‘Locate Region’ Spatial Analyst tool was applied to the final suitability map to locate three (3) optimum locations to site the estate developments. Conclusively, in view of the analysis and discoveries made in this research, finding optimum locations via the GIS–MCE based land suitability model for future housing development needs may prove highly resourceful. Hence, this study can likewise give a significant direction to future land use changes and practical and cost-effective arrangements in the urban areas where conditions are similar to those in Ede North LGA.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"151 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127062090","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}
Plastic waste (PW) is one type of solid waste. Its disposal and management pose environmental concerns in several countries around the world. PW causes serious problems for land, soil, & water. Recycling of PW is an innovative idea or way in this field, to produce new materials like plasticized concrete (PC), or rubberized concrete, which appears as one of the best solutions for disposing of PW, due to its economic and ecological advantages. Also, with the rapid growth and development in the construction industries with higher demands for concrete, emphasis has been laid on the sustainability of the concrete constituent materials. This study explores the ameliorative effects of plastic particles (PP) on some properties of concrete. The main aim is to study, and analysis of the mechanical, acoustical, & thermal properties of sustainable concrete incorporating PP & compared it with the traditional one or normal concrete (NC). The percentage of PP used in this study varies from 0-25%. The overall results show the addition of PP to the NC to obtain a lightweight one. It caused a reduction in the compressive strength by about 40-51% from NC. Also, the added PP decreased the thermal conductivity of the PC by about 50% from NC. However, PC improved sound absorption & thermal conductivity. Results have shown that the increasing contents of PW of concrete reduced the ultrasonic pulse velocity and the intensity of sound passing through PC. The significance of this study is to provide information to reuse, reduce, and recycled solid waste (i.e., PW) & to help future researchers both in academics and in the world, Civil engineers /Structural designers/Builder, etc. with dependable information on the use recycled materials for concrete production.
{"title":"An investigation of the use of plastic waste as aggregate in concrete","authors":"Kawa Kocher, Kamil. M. Yousif","doi":"10.38094/jgier30248","DOIUrl":"https://doi.org/10.38094/jgier30248","url":null,"abstract":"Plastic waste (PW) is one type of solid waste. Its disposal and management pose environmental concerns in several countries around the world. PW causes serious problems for land, soil, & water. Recycling of PW is an innovative idea or way in this field, to produce new materials like plasticized concrete (PC), or rubberized concrete, which appears as one of the best solutions for disposing of PW, due to its economic and ecological advantages. Also, with the rapid growth and development in the construction industries with higher demands for concrete, emphasis has been laid on the sustainability of the concrete constituent materials. This study explores the ameliorative effects of plastic particles (PP) on some properties of concrete. The main aim is to study, and analysis of the mechanical, acoustical, & thermal properties of sustainable concrete incorporating PP & compared it with the traditional one or normal concrete (NC). The percentage of PP used in this study varies from 0-25%. The overall results show the addition of PP to the NC to obtain a lightweight one. It caused a reduction in the compressive strength by about 40-51% from NC. Also, the added PP decreased the thermal conductivity of the PC by about 50% from NC. However, PC improved sound absorption & thermal conductivity. Results have shown that the increasing contents of PW of concrete reduced the ultrasonic pulse velocity and the intensity of sound passing through PC. The significance of this study is to provide information to reuse, reduce, and recycled solid waste (i.e., PW) & to help future researchers both in academics and in the world, Civil engineers /Structural designers/Builder, etc. with dependable information on the use recycled materials for concrete production.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132952335","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}
Landscape fragmentation has been found to be a major consequence of urbanization and of land use/cover (LULC) changes. Thus, this study analyzed the spatiotemporal land use/land cover changes of Ijebu Ode, Nigeria between 1986 and 2021. This is with a view to assessing the pattern of landscape fragmentation in the study area. The study used data obtained through Global Positioning System (GPS) receiver and satellite imageries (Landsat 5 MSS/TM, 1986; Landsat 7 ETM+, 2000 and 2014; and Landsat 8 OLI/TIR, 2021). Data were analyzed using spatial landscape metrics. Results indicated that Ijebu Ode has witnessed dramatic increase of built-up areas between 1986 and 2000 by 11.03%, 2000 to 2014 (65.24%), and 2014 to 2021 by 131.25%. Expansion of the built-up area was aided by reductions in bare land (1986 to 2000, 15.78%; 2014 to 2021, 98.27%), and the cultivated area by 47.74% between 1986 and 2014. Landscape metrics were estimated over the four epochs of study. Results revealed that most of the metrics suggest similar trends over the entire periods of study. However, Largest Patch Index (LPI), Landscape Shape Index (LSI) and Normalized Landscape Shape Index (NLSI) were useful in capturing the spatio-temporal variations in landscape transformation. Also, Class Area (CA) was useful to show the degree of land cover changes. The study concluded that location of spatial structures influenced the landscape patterns influence and urbanization processes in the study area. Hence, the study recommended for regular monitoring of the expansion of the built-up area to check the imminent urban sprawl in the study area.
{"title":"Evaluation of Land Cover Dynamics and Landscape Fragmentation in Ijebu Ode, Nigeria","authors":"A. Olayiwola, W. Salau","doi":"10.38094/jgier30249","DOIUrl":"https://doi.org/10.38094/jgier30249","url":null,"abstract":"Landscape fragmentation has been found to be a major consequence of urbanization and of land use/cover (LULC) changes. Thus, this study analyzed the spatiotemporal land use/land cover changes of Ijebu Ode, Nigeria between 1986 and 2021. This is with a view to assessing the pattern of landscape fragmentation in the study area. The study used data obtained through Global Positioning System (GPS) receiver and satellite imageries (Landsat 5 MSS/TM, 1986; Landsat 7 ETM+, 2000 and 2014; and Landsat 8 OLI/TIR, 2021). Data were analyzed using spatial landscape metrics. Results indicated that Ijebu Ode has witnessed dramatic increase of built-up areas between 1986 and 2000 by 11.03%, 2000 to 2014 (65.24%), and 2014 to 2021 by 131.25%. Expansion of the built-up area was aided by reductions in bare land (1986 to 2000, 15.78%; 2014 to 2021, 98.27%), and the cultivated area by 47.74% between 1986 and 2014. Landscape metrics were estimated over the four epochs of study. Results revealed that most of the metrics suggest similar trends over the entire periods of study. However, Largest Patch Index (LPI), Landscape Shape Index (LSI) and Normalized Landscape Shape Index (NLSI) were useful in capturing the spatio-temporal variations in landscape transformation. Also, Class Area (CA) was useful to show the degree of land cover changes. The study concluded that location of spatial structures influenced the landscape patterns influence and urbanization processes in the study area. Hence, the study recommended for regular monitoring of the expansion of the built-up area to check the imminent urban sprawl in the study area.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115866069","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}
Study of noise pollution (NSP) is an important subject due to its environmental and health impacts. If the levels of noise prove to be above health criteria, it’s possibility that it may contribute to short and long term physiological & psychological harmful effects. This study aimed to determining the spatial & temporal levels of NSP produced during Nowruz festival (NZFS) in Dahok city (DKC), Iraq, for 4 consecutive years (2016-2019), and comparing the noise levels during these periods. Also to identify possible sources of noise to assist in analysis NSP problematic areas & determine if city noise criterion are exceeded. The noise level measurements was conducted using sound level meter in 3 different areas in DKC. In Nawruz Eve, 2019, noise reached 102, 92.6, & 70.2 dB in Residential, Commercial, & Silence Zones respectively. The overall study suggests that the city is gradually hurtling towards high noise ambience, Most of the results obtained in this work are above the limits allowed both internationally (i.e. WHO) & locally. This is due to certain erroneous practices in daily activities during NZFS, spread of electrical generators, as well as heavy traffic in the city. Also, this work could be help to publicize awareness about NSP among the people.
{"title":"Evaluation of Noise Pollution for Four consecutive years throughout Nowruz festival in Dahok city, Iraq","authors":"K. Yousif","doi":"10.38094/jgier30147","DOIUrl":"https://doi.org/10.38094/jgier30147","url":null,"abstract":"Study of noise pollution (NSP) is an important subject due to its environmental and health impacts. If the levels of noise prove to be above health criteria, it’s possibility that it may contribute to short and long term physiological & psychological harmful effects. This study aimed to determining the spatial & temporal levels of NSP produced during Nowruz festival (NZFS) in Dahok city (DKC), Iraq, for 4 consecutive years (2016-2019), and comparing the noise levels during these periods. Also to identify possible sources of noise to assist in analysis NSP problematic areas & determine if city noise criterion are exceeded. The noise level measurements was conducted using sound level meter in 3 different areas in DKC. In Nawruz Eve, 2019, noise reached 102, 92.6, & 70.2 dB in Residential, Commercial, & Silence Zones respectively. The overall study suggests that the city is gradually hurtling towards high noise ambience, Most of the results obtained in this work are above the limits allowed both internationally (i.e. WHO) & locally. This is due to certain erroneous practices in daily activities during NZFS, spread of electrical generators, as well as heavy traffic in the city. Also, this work could be help to publicize awareness about NSP among the people.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134238537","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}
This paper advances the existing body of knowledge on the suitability of accuracy derivable from the use of smartphones for cadastral mapping. Zenvus App software was installed on two smartphones of a different make. A set of dual-frequency GPS Promark 3 receivers and two different smartphones of different make were used for data acquisition. Observations were carried out at the boundaries of ten parcels of land, comprising 46 boundary points. Coordinates of these points were obtained using Differential Global Positioning System (DGPS) observation in static mode and two android smartphones (Samsung A70 and Tecno Spark 3 Pro). Mean score, root means square error, and one-way analysis of variance was used to show significant differences in the equipment used. Overall, both the accuracy (mean) and precision (RMSE) were lower than those obtained by Differential GPS. A one-way analysis of variance (ANOVA) was calculated on the values of both X and Y. For X, the analysis was not significant, F (1, 45)= 0.88, p= 0.419 and for Y, the analysis was also not significant, F(1,45) =0.97, p=0.383. The total RMSE shows that coordinates of points as obtained by the Samsung smartphone (3.368) was more precise than Tecno (4.041). However, the two smartphones (Tecno and Samsung) were less accurate than differential GPS. This implies that there is a 95% chance that the errors in the estimates are less than 6.993m (for Tecno) and 5.848m (for Samsung) respectively. The variation in the observations obtainable with smartphones affects both linear and polygon estimates. The study concluded that the magnitude of these errors is significant in cadastral survey practices and hence not suitable for use. It is recommended that further studies be carried out on the use of the Zenvus app on centimeter grade smartphones probably this could yield a better result suitable for cadastral mapping.
{"title":"Comparative Analysis of Smartphones and Survey-Grade GNSS Receivers for Parcel Boundary Determination","authors":"Caleb Oluwadare, Mary Salami","doi":"10.38094/jgier30145","DOIUrl":"https://doi.org/10.38094/jgier30145","url":null,"abstract":"This paper advances the existing body of knowledge on the suitability of accuracy derivable from the use of smartphones for cadastral mapping. Zenvus App software was installed on two smartphones of a different make. A set of dual-frequency GPS Promark 3 receivers and two different smartphones of different make were used for data acquisition. Observations were carried out at the boundaries of ten parcels of land, comprising 46 boundary points. Coordinates of these points were obtained using Differential Global Positioning System (DGPS) observation in static mode and two android smartphones (Samsung A70 and Tecno Spark 3 Pro). Mean score, root means square error, and one-way analysis of variance was used to show significant differences in the equipment used. Overall, both the accuracy (mean) and precision (RMSE) were lower than those obtained by Differential GPS. A one-way analysis of variance (ANOVA) was calculated on the values of both X and Y. For X, the analysis was not significant, F (1, 45)= 0.88, p= 0.419 and for Y, the analysis was also not significant, F(1,45) =0.97, p=0.383. The total RMSE shows that coordinates of points as obtained by the Samsung smartphone (3.368) was more precise than Tecno (4.041). However, the two smartphones (Tecno and Samsung) were less accurate than differential GPS. This implies that there is a 95% chance that the errors in the estimates are less than 6.993m (for Tecno) and 5.848m (for Samsung) respectively. The variation in the observations obtainable with smartphones affects both linear and polygon estimates. The study concluded that the magnitude of these errors is significant in cadastral survey practices and hence not suitable for use. It is recommended that further studies be carried out on the use of the Zenvus app on centimeter grade smartphones probably this could yield a better result suitable for cadastral mapping.","PeriodicalId":273675,"journal":{"name":"Journal of Geoinformatics & Environmental Research","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115934730","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}
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