scholarly journals Estimate of Erosion and Sedimentation in Semi-arid Basin using Empirical Models of Erosion Potential within a Geographic Information System

2010 ◽  
Vol 3 ◽  
pp. ASWR.S3427 ◽  
Author(s):  
Fazel Amiri
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Geographic Information ◽  
Class Iii ◽  
Uniform Sampling ◽  
Final Layer ◽  
Land Use Types ◽  
Significant Difference ◽  
High Sedimentation ◽  
Gis Software

This research is aimed at predicting erosion and sedimentation in the Ghareh Aghach Basin in the central part of Iran using Erosion Potential Model (EPM) models incorporated into Geographic Information System (GIS) software. This basin has an area of about 8955 hectares. The region has a range of vegetation, geological, soil texture and land use types. The basin was subdivided into 5 sub-basins. Data required for this study were collected in part through published reports, whilst the remaining was derived by field surveys. Necessary maps in EPM models were prepared in Autocad-2006 medium and were transported to IILWIS, after some revision. After constructing topologies for all polygons, we entered weightings for all layers within the Arc-View software. Combinations of all layers were managed thereafter. Coefficient of each factor was determined, and erosion intensity coefficient (Z) was calculated. Four layers for EPM model were combined to develop the final layer of erosion and sedimentation. The results of the EPM model for homogenous and uniform sampling units showed that 0.19% (16.7 ha) of the total watershed area were classified as class I of erosion category with very low sedimentation and 15.1% (1352 ha) were classified as class II of erosion category with low sedimentation and 41.3% (3699 ha) were classified as class III of erosion category with medium sedimentation and 13.2% (1175 ha) were classified as class IV of erosion category with high sedimentation and finally 30.2% (2711 ha) were classified at class V of erosion category with very high sedimentation, respectively. The result of comparing erosion and sediment values using an EPM model with measured values showed that no significant difference was observed between the estimated and measured values ( P < 0.05).

scholarly journals Comparative analysis of QGIS plugins for Web Maps creation

La Granja ◽  
2021 ◽  
Vol 34 (2) ◽  
pp. 8-26
Author(s):  
Lia Duarte ◽  
Catarina Queirós ◽  
Ana Cláudia Teodoro
Keyword(s):  
Information System ◽  
Comparative Analysis ◽  
Geographic Information System ◽  
Open Source ◽  
Open Source Software ◽  
Geographic Information ◽  
Geospatial Data ◽  
Advantages And Disadvantages ◽  
Gis Software

QGIS is a free and open-source software that allows viewing, editing, and analyzing georeferenced data. It is a Geographic Information System (GIS) software composed by tools that allow to manipulate geographic information and consequently to create maps which help to get a better understanding and organization of geospatial data. Unfortunately, maps created directly in the GIS desktop software are not automatically transferred to a website. This research aimed to compare publishing capabilities in different QGIS plugins to create Web Maps. This study analyzes four QGIS plugins (QGIS2Web, QGIS Cloud, GIS Cloud Publisher and Mappia Publisher), performing a comparison between them, considering their advantages and disadvantages, the free and subscription plans, the tools offered by each plugin and other generic aspects. The four plugins were tested in a specific case study to automatically obtain different Web Maps. This study could help users to choose the most adequate tools to publish Web Maps under QGIS software.

scholarly journals Quantifying The Significance of Distance to Temporal Dynamics of Covid-19 Cases in Nigeria Using a Geographic Information System

2021 ◽  
Vol 6 (1) ◽  
pp. 40
Author(s):  
Ifeyinwa Sarah Obuekwe ◽  
Umar Saleh Anka ◽  
Sodiq Opeyemi Ibrahim ◽  
Usman Ahmad Adam
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Spatial Autocorrelation ◽  
Temporal Dynamics ◽  
Close Contact ◽  
Geographic Information ◽  
Movement Restriction ◽  
Creative Commons ◽  
Spatial Coverage ◽  
Significant Difference

The coronavirus disease 2019 (COVID-19) is caused by a new strain of coronavirus that spreads primarily by close contact. Although Nigeria adopted lockdown measures, no defined strategies were used in setting the distance threshold for these lockdowns. Hence, understanding the drivers of COVID-19 is pivotal to an informed decision for containment measures in the absence of vaccines. Spatial and temporal analyses are crucial drivers to apprehending the pattern of diseases over space and time. Thus, this study aimed to quantify the significance of distance to the temporal dynamics of COVID-19 cases in Nigeria using the Geographic Information System. Incremental spatial autocorrelation was used to analyze datasets of each month in ArcGIS. March, April, May, and June exhibited patterns with no significant peaks, while July and August exhibited patterns with two statistically significant peaks. The first and second peaks of July were 301,338.39 and 365,947.83 meters, respectively, while August was 301,338.39 and 336,128.09 meters, respectively. Therefore, a significant difference in the clustering of COVID-19 over distances between July and August was established. This indicated that progression in the spread of the virus increased the virus's spatial coverage while the distance of risk of exposure decreased. This study's findings could be utilized to establish maximum movement restriction areas to contain the spread of COVID-19. Keywords: Distance; Incremental spatial autocorrelation; Covid-19; Disease; Nigeria Copyright (c) 2021 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License

scholarly journals Análise da vulnerabilidade socioambiental no município de Vitória-ES, com o apoio de um SIG livre / Analysis of socio-environmental vulnerability in the municipality of Vitória-ES, with the support of a free GIS

2018 ◽  
Vol 28 (55) ◽  
pp. 1076-1102 ◽  
Author(s):  
Helio Carreço ◽  
Aurélia Hermínia Castiglioni
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Low Income ◽  
Principal Component ◽  
Vulnerability Index ◽  
Geographic Information ◽  
Espírito Santo ◽  
Environmental Vulnerability ◽  
Espirito Santo ◽  
Gis Software

Este trabalho tem por objetivo analisar a vulnerabilidade socioambiental enfrentada pelas parcelas de baixa renda da população dos Bairros de Vitória-ES e demonstrar a relevância dos Sistemas de Informações Geográficas (SIG) como ferramenta de mensuração e representação destas situações. Para isso, será demonstrada a viabilidade da adoção de geotecnologias livres para a abordagem deste tema, por meio da análise de variáveis socioeconômicas, infraestruturais e do meio físico. O estudo fundamenta-se em dados produzidos pelo IBGE, pela Prefeitura Municipal de Vitória e pela Secretaria de Segurança Pública do Espírito Santo, relativos ao período de 2010 a 2015. A análise e redução de variáveis são feitas por meio de critérios objetivos utilizando a Análise de Componentes Principais (ACP). As variáveis analisadas mostraram alta correlação e os resultados foram utilizados para a construção do Índice de Vulnerabilidade Socioambiental. A partir dos valores do índice, os bairros foram espacializados por meio de um software livre de SIG, o que permitiu formar agrupamentos de unidades de análise que apresentam semelhanças quanto à vulnerabilidade socioambiental, sendo possível identificar uma notável disparidade entre os bairros de Vitória.Palavras-chave: Vulnerabilidade Socioambiental; Sistema de Informação Geográfica; Geotecnologias Livres.AbstractThis paper aims to analyze the Socio-Environmental Vulnerability faced by the low income portion of the population from Vitoria – ES and show the importance of the Geographic Information System (GIS) as a tool of measurement and representation of these situations. Thus, the feasibility of adopting free geotechnologies will be demonstrated in order to approach this theme by means of analyzing the socioeconomic, infrastructural as well as physical environment variables. The study is based on data produced by IBGE, City Hall of Vitoria and by Secretary of Public Security of Espirito Santo, related to the period from 2010 to 2015. The analysis and reduction of variables are made by means of objective criteria utilizing the Principal Component Analysis (PCA). The variables analyzed showed high correlation and the results were utilized for the construction of Socio-Environmental Vulnerability Index. From the values of the index, the neighborhoods were spatialized through a free GIS software which allowed forming groups of neighborhoods that present similarities regarding the Socio-Environmental Vulnerability. It was possible to identify a notable disparity among the neighborhoods of Vitoria.Keywords: Socio-environmental Vulnerability; Geographic Information System (GIS); Free Geotechnologies.

scholarly journals Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

Hydrology ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 60
Author(s):  
Qais Al-Madhlom ◽  
Nadhir Al-Ansari ◽  
Bashar Abid Hamza ◽  
Jan Laue ◽  
Hussain Musa Hussain
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Large Scale ◽  
Geographic Information ◽  
Effective Porosity ◽  
Important Criterion ◽  
Seepage Velocity ◽  
The West ◽  
Gis Software ◽  
Saturated Thickness

Seepage velocity is a very important criterion in infrastructure construction. The planning of numerous large infrastructure projects requires the mapping of seepage velocity at a large scale. To date, however, no reliable approach exists to determine seepage velocity at such a scale. This paper presents a tool within ArcMap/Geographic Information System (GIS) software that can be used to map the seepage velocity at a large scale. The resultant maps include both direction and magnitude mapping of the seepage velocity. To verify the GIS tool, this study considered two types of aquifer conditions in two regions in Iraq: silty clayey (Babylon province) and sandy (Dibdibba in Karbala province). The results indicate that, for Babylon province, the groundwater flows from the northwest to southeast with a seepage velocity no more than 0.19 m/d; for the Dibdibba region, the groundwater flows from the west to the east with a seepage velocity not exceeding 0.27 m/d. The effectiveness of the presented tool in depicting the seepage velocity was thus demonstrated. The accuracy of the resultant maps depends on the resolution of the four essential maps (groundwater elevation head, effective porosity, saturated thickness, and transmissivity) and locations of wells that are used to collect the data.

Differences in Visual Programming for GIS

2014 ◽  
Vol 519-520 ◽  
pp. 355-358
Author(s):  
Zdena Dobesova ◽  
Petr Dobes
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Visual Programming ◽  
Geographic Information ◽  
Visual Languages ◽  
Daily Work ◽  
Graphical Notations ◽  
Flow Diagrams ◽  
Suitable Area ◽  
Gis Software

ArcGIS and AutoCAD Map 3D are both geographic information system (GIS) software. Both are used worldwide in many countries and companies. The dataflow design in visual editors is suitable for daily work. Visual languages are valuable for wide user community. Dataflow design automatizes typical GIS tasks and makes the processes universal. It is possible to construct simple or complex workflows with a visual editor in both software. The concept of visual programming is highly acceptable for GIS users because they think spatially and graphically. The article presented practical example for automatic finding of suitable area for construction of new hotel. Two data flow diagrams for the same task demonstrate the differences between graphical notations in ArcGIS and AutoCAD Map.

scholarly journals Geographic Information System in Mapping Land Use in South Aceh District

2018 ◽  
Vol 3 (2) ◽  
pp. 70
Author(s):  
Oktalia Triananda Lovita ◽  
Resky Rusnanda
Keyword(s):  
Land Use ◽  
Information System ◽  
Geographic Information System ◽  
Spatial Data ◽  
Geographic Information ◽  
Landsat 8 ◽  
Gis Technology ◽  
Large Bulk ◽  
Housing Complex ◽  
Gis Software

The dawn of the age of computerization has opened up a new horizon and paradigm in the decision making process and dissemination of information. In the past difficulties arise when a large bulk of data representing of modeling a certain phenomenon was to be compiled because these data were often detached from each other. With Geographic Information System (GIS), the storing, administration, processing, manipulation, analysis and exhibition of important data in a system of information can be done with ease and speed. This study attempts to represent and model the available data of Sourt Aceh Selatan concerning its administrative boundaries, land, geology, land use and slope, Using ArcGIS 10.3, a GIS software that is capable to represent spatial data as well as attributes of the study areas. the results of rms error on landsat 8 oil images obtained mean 0.51, GIS technology in civil engineering work is normally used in the planning and preparation of a new land for the development of a housing complex.

scholarly journals SISTEM INFORMASI GEOGRAFIS BERBASIS MOBILE ANDROID UNTUK PEMETAAN LOKASI PENGRAJIN KERAJINAN TANGAN KHAS GORONTALO

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Irfan Abbas
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Mobile Device ◽  
Geographic Information ◽  
Location Information ◽  
User Community ◽  
The People ◽  
Global Positioning ◽  
Is Integration ◽  
Gis Software

Gorontalo handicraft industry is already widespread in the territory of Indonesia, and even then more introduced by the people of Gorontalo in overseas. In early 2006, Gorontalo's unique handicraft products received attention from both central and provincial governments to fight for patents on products (Hinelo, 2008). It shows that the creative industry business run by the Gorntalo Society has been well developed. The researcher intends to design a mobile geographic information system based on android for mapping the location of craftsmen typical of Gorontalo handicraft. This system is the application of GIS mobile system that is integration between three technology, that is GIS software, Global Positioning System (GPS) technology, and mobile device. This mobile-based designed system is intended to make this system easier to use by the Community because the system can be accessed simply by using a mobile device. While android is a mobile phone operating system that grows in the middle of other operating systems that develop this dewasi. This system will provide location information dilegkapi with travel routes as well as a description of the handicraft industry selected by the user / community. This system will provide location information dilegkapi with travel routes as well as a description of the handicraft industry selected by the user / community. With this system will be able to provide convenience to anyone who wants to find the location / location of handicraft industry typical Karawo patterned clothing Gorontalo. This system can run well based on testing on system logic using whitebox method obtained value of Ciclometic Complexity (CC) = 3. Keywords: Geographic Information System, Android, Karawo

scholarly journals Topographic distribution of gastritis in heavy pigs investigated by a geographic information system approach

2016 ◽  
Vol 11 (2) ◽  
Author(s):  
Ernesto Pascotto ◽  
Diego Capraro ◽  
Paolo Tomè ◽  
Mauro Spanghero
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Geographic Information ◽  
Pathological Examination ◽  
Gis Analysis ◽  
Small Areas ◽  
Software Analysis ◽  
Gis Software ◽  
Follicular Gastritis ◽  
Topographic Distribution

The aim of this paper was to determine the topographic distribution of gastritis lesions in pigs through an open source geographic information system (GIS) software analysis. The stomachs of 146 Italian heavy pigs were collected at slaughter and subjected to macroscopic pathological examination of the internal mucosa. A total of 623 lesions were either classified as hyperplastic or follicular (97%) with the remaining minority of lesions categorised as atrophic and simple. The hyperplastic gastritis lesions had an average surface of 77.8 cm<sup>2</sup> and were mainly located in an oval shaped area of the fundus region of the stomach near the <em>Curvatura ventriculi major</em>. The follicular gastritis lesions had generally a smaller surface (40.3 cm<sup>2</sup>) and were concentrated in two distinct small areas of the pyloric region. The GIS analysis provided the opportunity to produce useful maps showing the distribution and characteristics of gastritis in pigs.

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