scholarly journals Testing approaches to visualize land cover/land use changes in time series with Web GIS microservice tools

2021 ◽  
Vol 4 ◽  
pp. 1-8
Author(s):  
Jesse Friend ◽  
Mathias Jahnke ◽  
Niels Walen ◽  
Gernot Ramminger

Abstract. Web applications which are high functioning, efficient, and meet the performance demand of the client are essential in modern cartographic workflows. With more and more complex spatial data being integrated into web applications, such as time related features, it is essential to harmonize the means of data presentation so that the end product is aligned with the needs of the end-user. In this paper we present aWeb GIS application built as a microservice which displays various timeseries visualizations to the user to streamline intuitiveness and functionality. The prototype provides a solution which could help to understand various ways in which current web and spatial analysis methods can be combined to create visualizations that add value to existing spatial data for cartographic workflows.

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Mojtaba Pirnazar ◽  
Nasrin Haghighi ◽  
Donya Azhand ◽  
Kaveh Ostad-Ali-Askari ◽  
Saeid Eslamian ◽  
...  

To achieve sustainable development, detailed planning, control and management of land cover changes that occur naturally or by human caused artificial factors, are essential. Urban managers and planners need a tool that represents them the information accurate, fast and in exact time. In this study, land use changes of 3 periods, 1994-2002, 2002-2009, 2009-2015 and predictions of 2009, 2015 and 2023 were assessed. In this paper, Maximum Likelihood method was used to classify the images, so that after evaluation of accuracy, amount of overall accuracy for images of 2013 was 85.55% and its Kappa coefficient was 80.03%. To predict land use changes, Markov-CA model was used after assessing the accuracy, and the amount of overall accuracy for 2009 was 82.57% and for 2015 was 93.865%. Then web GIS application was designed via map server application and evoked shape files through map file and open layers to browser environment and for design of appearance of website CSS, HTML and JavaScript languages were used. HTML is  responsible for creating the foundation and overall structure of webpage but beautifying and layout design on CSS.


2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Roxanne Lai ◽  
Takashi Oguchi

<p><strong>Abstract.</strong> Changing land use is an increasingly important issue as human habits, behaviors, and needs change. There has been an increase in land and agricultural abandonment in some places of the world. In Japan, movement of the population from rural to urban areas have resulted in much land and agricultural abandonment. In 2016, a land ministry survey showed that 4.1 million hectares of land in Japan had unclear ownership, with farmland making up 16.9% of the total. As vegetation cover changes after land abandonment, this temporal and spatial effect may have important effects on geomorphic processes such as landslide susceptibility and landslide kinematics.</p><p>Here we track long-term land use changes over vegetated landslide areas of the Sanbagawa and Mikabu Belts of Shikoku Island, Japan. The Sanbagawa and Mikabu Belts are metamorphic belts that run across Southwest Japan, and are home to numerous large crystalline schist landslides, including the widely-studied slow but continuously moving Zentoku landslide. Villages and communities have been built on these landslide areas due to historical and cultural factors, as well as the fertility of the soil. Consequently, given the changing land uses including land abandonment in these landslide areas over time, we use long-term high-resolution land cover vegetation datasets to examine first the long-term land use changes, and then use statistical methods to explore their relationships with landslide susceptibility and kinematics. Mapping of spatial data and their analysis using GIS constitute a core part of the research. The results suggest interconnections between land use changes and land movement.</p>


2018 ◽  
Vol 20 (03) ◽  
pp. 1840001 ◽  
Author(s):  
Ainhoa Gonzalez ◽  
Álvaro Enríquez-de-Salamanca

Anticipating and avoiding adverse environmental effects resulting from land-use changes and other anthropogenic interventions is the key objective of environmental assessment (EA). EA requires consideration of multiple environmental criteria to establish the receiving environment’s sensitivity and capacity to absorb change. With the increasing availability of and accessibility to spatial data, the adoption of spatial multi-criteria analysis, also known as GIS–MCA, has become a prominent technique to support EA. Using two diverging case studies, this paper reflects upon the advantages and disadvantages of applying GIS–MCA in EA reported in literature. While the significant contribution of this approach to increasing objectivity, transparency and accountability is corroborated, it is recognised that there is no one-fits-all solution. The widespread application of GIS–MCA calls for further research on the effects that methodological assumptions and data limitations may have at various planning hierarchies and decisions, and how these can be addressed to optimise the value of this technique in EA.


2019 ◽  
Vol 8 (1) ◽  
pp. 19-27
Author(s):  
Chris Antoni P Purba ◽  
Max Rudolf Muskananfola ◽  
Sigit Febrianto

ABSTRAKDesa Timbulsloko yang berada di Kabupaten Demak mengalami perubahan garis pantai dan perubahan penggunaan lahan akibat erosi dan akresi. Tujuan penelitian ini adalah untuk mengetahui perubahan garis pantai akibat erosi dan akresi, mengetahui perubahan penggunaan lahan dan kaitan antara perubahan garis pantai dengan penggunaan lahan. Penelitian ini dilaksanakan pada bulan Agustus – September 2017. Metode penelitian yang digunakan adalah metode deskriptif kuantitatif. Pengolahan data citra dilakukan penggabungan band, koreksi geometrik, koreksi radiometri, pemotongan citra, digitasi dan image classification. Analisis data secara spasial menggunakan metode overlay. Pada tahun 2000-2005 erosi seluas 19,3872 ha, pada tahun 2005-2010 erosi seluas 107,3174 ha dan akresi seluas 0,3622 ha, pada tahun 2010-2015 erosi seluas 39,6483 ha dan akresi seluas 3,0160 ha, pada tahun 2015-2017 erosi seluas 0,9502 ha dan akresi seluas 7,2646 ha. Penggunaan lahan hasil klasifikasi citra terdapat 5 kelas yaitu : mangrove, tambak, genangan, permukiman dan vegetasi darat. Pada tahun 2000-2005 penggunaan lahan mengalami perubahan luasan tertinggi yaitu genangan yang awal nya seluas 92,39 Ha menjadi tambak seluas 67,66 Ha. Tahun 2005-2010 perubahan tertinggi yaitu genangan yang awalnya seluas 55,42 Ha menjadi tambak seluas 39,46 Ha. Tahun 2010-2015 penggunaan lahan yang mengalami perubahan luasan tertinggi yaitu tambak seluas 353,05 Ha menjadi genangan sebesar 136,43 Ha. Tahun 2015-2017 penggunaan lahan yang mengalami perubahan terbesar yaitu genangan yang awalnya seluas 175,41 Ha menjadi tambak seluas 33,63 Ha. Perubahan garis pantai dan penggunaan lahan memiliki keterkaitan yaitu penggunaan lahan menyebabkan perubahan garis pantai dan berdampak pada penggunaan lahan di Desa Timbulsloko. ABSTRACT Timbulsloko Village in Demak Regency had shoreline changes and land use changes due to erosion and accretion. The purpose of this study was to determine shoreline changes due to erosion and accretion, to identify changes in land use and the relationship between changes in coastline and land use. This research was conducted during August - September 2017. The research method used was quantitative descriptive method. Image data processing was carried out combining bands, geometric corrections, radiometric correction, image cutting, digitization and image classification. Spatial data analysis using the overlay method. In 2000-2005 erosion area was 19,3872 ha, in 2005-2010 erosion area was 107,3174 ha and accretion area was 0,3622 ha, in 2010-2015 erosion area was 39,6483 ha and accretion covering 3,0160 ha, in 2015-2017 erosion covered 0.9502 ha and accretion area was 7.2646 ha. There are 5 classes of land use from image classification, namely: mangroves, dikes, ponds, settlements and land vegetation. In 2000-2005 land use experienced the highest change in area, namely the initial inundation covering an area of 92.39 hectares to  pond area of 67.66 hectares. In 2005-2010 the highest change was the initial inundation covering an area of 55.42 ha to pond covering an area of 39.46 ha. Become 2010-2015 land use experienced the highest change in area, namely ponds covering an area of 353.05 ha to a pool of 136.43 ha. In 2015-2017 the land use that experienced the biggest change was the initial inundation of 175.41 ha into an area of 33.63 ha. Changes in coastline and land use have a linkage that is land use causes changes in coastline and impacts on land use in Timbulsloko Village. 


Geografie ◽  
2015 ◽  
Vol 120 (3) ◽  
pp. 422-443 ◽  
Author(s):  
Magdalena Indrová ◽  
Lucie Kupková

The main objective of this study was to compare the capabilities of the Dyna- CLUE and Land Change Modeler (LCM) software based on the results of land use/cover development predictions in selected cadastres of the Prague suburban area. Time series of land use data, land use plans of the municipalities, and data on soil protection were used for this analysis. Land use prediction maps for the year 2020 were created using both software tools. The results of the comparison showed that the models respect the restriction of development. In accordance with the local land use plans, new residential development was properly allocated. As for commercial areas, the requirements were not completely fulfilled. It is evident that both models are able to produce correct maps of future land use based on specified requirements at the level of several cadastral units (area approx. 2,000 ha). However, the instability of LCM and the necessity of using other software while working with Dyna-CLUE somewhat complicated the work.


Author(s):  
Dedy Miswar ◽  
Listumbinang Halengkara ◽  
I Gede Sugiyanta ◽  
Ahmad Sahid Al Azhari

Ambarawa District has allegedly experienced many changes in land use. Changes in land use in Ambarawa District are dominated by changes in agricultural land to non-agricultural land. This is because the land in Ambarawa District is influenced by the role of its inhabitatns in utilizing the land so that it has an impact on land use change. This study aims to determine changes in land use, the factors that influence land use changes, the direction of development and what types of use changes are most dominant in Ambarawa District, Pringsewu Regency. The method used in this research is survei and image interpretation by looking at changes in land use in each area. The population used in this study were all villages in Ambarawa District, totaling 8 villages which were suspected of experiencing changes in land use. Collecting data in this study is a descriptive geospatial approach through the overlay technique of land use spatial data. The results showed that there was a change in land use in Ambarawa District year 2014-2019 covering an area of 2.195,8 ha (70,83%), which was caused by social and economic factors, namely the increase in population and workers and the direction of land use changes to the west and east.


2015 ◽  
Vol 29 (1) ◽  
Author(s):  
Andi Ramlan ◽  
Risma Neswati ◽  
Sumbangan Baja ◽  
Muhammad Nathan

The purpose of this study is to analyze land use changes in the Kelara watershed and to assess the suitability of current land use changes with the spatial planning regulation of Jeneponto within Kelara basin. This study integrates various survey techniques, remote sensing, and geographic information system technology analysis. Geospatial information used in this study consists of Landsat ETM 7+ satellite imagery (2009) and Landsat 8 (2014) as well as a number of spatial data based on vector data which is compiled by the Jeneponto Government. Remote sensing data using two time series (2009 and 2014) are analyzed by means of supervised classification and visual classification.  The analysis indicated that land use type for the paddy fields and forests (including mangroves) converted become a current land use which is inconsistent with the spatial planning regulation of Jeneponto.The use of land for settlement tends to increase through conversion of wetlands (rice fields). These conditions provide an insight that this condition will occur in the future, so that providing the direction of land use change can be better prepared and anticipated earlier.


Author(s):  
S. Agrawal ◽  
R. D. Gupta

Geographic Information System (GIS) is a tool used for capture, storage, manipulation, query and presentation of spatial data that have applicability in diverse fields. Web GIS has put GIS on Web, that made it available to common public which was earlier used by few elite users. In the present paper, development of Web GIS frameworks has been explained that provide the requisite knowledge for creating Web based GIS applications. Open Source Software (OSS) have been used to develop two Web GIS frameworks. In first Web GIS framework, WAMP server, ALOV, Quantum GIS and MySQL have been used while in second Web GIS framework, Apache Tomcat server, GeoServer, Quantum GIS, PostgreSQL and PostGIS have been used. These two Web GIS frameworks have been critically compared to bring out the suitability of each for a particular application as well as their performance. This will assist users in selecting the most suitable one for a particular Web GIS application.


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