Why Open Source GIS Software Is Not For Me

Fertilization is one of the most important components of precision agriculture, ensuring high and stable crop yields. The process of spatial interpolation of soil sample data is recognized as a reliable method of determining the prescription rates for precise fertilization. However, the application of a free open-source geographic information system (GIS) software was often overlooked in the process. In this study, a method of precise fertilization prescription map creation was developed using an open-source GIS software to enable a wider and cheaper availability of its application. The study area covered three independent locations in Osijek-Baranja County. A method was developed for the fertilization of sugar beet with phosphorous pentoxide, but its application is universal with regard to the crop type. An ordinary kriging was determined as an optimal interpolation method for spatial interpolation, with the mean RMSE of 1.8754 and R2of 0.6955. By comparing the precision fertilization prescription rates to a conventional approach, the differences of 4.1 kg ha-1 for Location 1, 15.8 kg ha-1 for Location 2, and 11.2 kg ha-1 for Location 3 were observed. These values indicate a general deficit in soil phosphorous pentoxide, and precise fertilization could ensure its optimal content in the future sowing seasons.

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Development of Assessment Criteria for Various Open Sources GIS Software Packages

Research Anthology on Usage and Development of Open Source Software ◽

10.4018/978-1-7998-9158-1.ch022 ◽

2021 ◽

pp. 398-412

Author(s):

Shahriar Shams

Keyword(s):

Open Source ◽

Open Source Software ◽

Assessment Criteria ◽

Significant Development ◽

Analysis And Design ◽

Advantages And Disadvantages ◽

Software Packages ◽

Open Source Gis ◽

Gis Software

There has been a significant development in the area of free and open source geospatial software. Research has flourished over the decades from vendor-dependent software to open source software where researchers are paying increasing attention to maximize the value of their data. It is often a difficult task to choose particular open source GIS (OGIS) software among a number of emerging OGIS software. It is important to characterise the projects according to some unified criteria. Each software has certain advantages and disadvantages and it is always time consuming to identify exactly which software to select for a specific purpose. This chapter focuses on the assessment criteria enabling developers, researchers, and GIS users to select suitable OGIS software to meet their requirements for analysis and design of geospatial application in multidisciplinary fields. This chapter highlights the importance of assessment criteria, followed by an explanation of each criteria and their significance with examples from existing OGIS software.

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Flood risk assessment and management for urban areas in Brazilian Pantanal using free and open source GIS software

International Journal of Risk Assessment and Management ◽

10.1504/ijram.2020.106982 ◽

2020 ◽

Vol 23 (2) ◽

pp. 191

Author(s):

Rodrigo Martins Moreira ◽

Cleiton Oliveira Dos Santos

Keyword(s):

Risk Assessment ◽

Open Source ◽

Flood Risk ◽

Urban Areas ◽

Flood Risk Assessment ◽

Open Source Gis ◽

Brazilian Pantanal ◽

Gis Software ◽

Risk Assessment And Management

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How to circumvent the limitations of open source software and orthorectify how (or better) than with commercial software

10.5194/egusphere-egu2020-8316 ◽

2020 ◽

Author(s):

Valerio Baiocchi ◽

Roberta Onori ◽

Felicia Monti ◽

Francesca Giannone

Keyword(s):

Open Source ◽

Satellite Images ◽

Research Work ◽

Three Dimensional ◽

Commercial Software ◽

Whole Process ◽

High Resolution Satellite Images ◽

Open Source Gis ◽

Gis Software ◽

Better Than

High and very high resolution satellite images are now an irreplaceable resource for earth observation in general and for the extraction of hydrogeological information in particular. In order to use them correctly and compare them with previous surveys and maps, they must be treated geometrically to remove the distortions introduced by the acquisition process. Orthorectification is not a simple georeferencing because the process must take into account the three-dimensional acquisition geometry of the sensor. For this reason orthorectification must be performed within specific commercial software with additional costs compared to image acquisition which, in some cases, is currently free of charge. Some orthorectification algorithms, mainly based on the RPC approach, are available in open source GIS software such as QGIS. OTB (Orpheus toolbox) for QGIS contains some of these algorithms but its interfaces are not clear and there are some incomprehensible limitations such as the impossibility to input three-dimensional ground control points (GCPs). This severely limits the final achievable accuracy because it does not allow to correctly estimate the influence of different ground morphologies on the acquisition geometry. To get around these limitations you can make a "pseudo DEM" and other expedients to complete the whole process obtaining absolute results comparable if not better than those of commercial software. The proposed procedure may not be the fastest but it can be a valid alternative for those who use satellite images as a tool in their research work.&#160;

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Lifelong training program on QGIS tools for earth observation sciences in south-east Europe

European Journal of Geography ◽

10.48088/ejg.b.idr.12.3.88.102 ◽

2021 ◽

Vol 12 (3) ◽

pp. 88-102

Author(s):

Bashkim IDRIZI ◽

◽

Lyubka PASHOVA ◽

Pal NIKOLLI ◽

◽

...

Keyword(s):

Open Source ◽

Earth Observation ◽

Geospatial Information ◽

Digital Revolution ◽

East Europe ◽

South East Europe ◽

Development Tools ◽

Open Source Gis ◽

Software Platforms ◽

Gis Software

Earth Observation (EO) data are an indispensable source of useful geospatial information, which can be efficiently combined with other data within the latest released open-source QGIS software. This paper aims: i) to present a general overview of the QGIS EO plugins; ii) to promote the Lifelong Learning (LLL) courses for open-source QGIS software tools provided by the Geo-SEE Institute from Skopje; iii) to appreciate the advantages of open-source QGIS for developing and improving EO applications. The training objectives are to enhance the research, development tools and technologies of QGIS and stimulate the obtaining and disseminating knowledge to utilize the open-source GIS software. Furthermore, there is a growing need to increase the number of well-educated professionals on issues related to the EO sciences in South-East Europe (SEE), who are better prepared for the labor market in today's digital revolution by using QGIS tools and plugins combined with other related GIS software platforms provided by the OSGeo family.

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