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Use of Smartphones for Rapid Location Track.ng in Mega Scale Soil Sampling

Open Journal of Applied Sciences 2021年第3期11卷 239-253页

作者： Harsha k. k.dupitiya Ranga N. D. Madushan upul k. rathnayake Rohana Thilak.siri Samantha B. Dissanayak. Mojith Ariyaratne Buddhi Marambe Mohomad S. Nijamudeen Dinaratne Sirisena Lalith Suriyagoda Natural Resource Management Centre Department of Agriculture Peradeniya Sri Lanka Department of Crop Science Faculty of Agriculture University of Peradeniya Peradeniya Sri Lanka Rice Research and Development Institute Department of Agriculture Batalagoda Sri Lanka Field Crops Research and Development Institute Department of Agriculture Maha-Illuppallama Sri Lanka

Conventional, grid-based sampling location track.ng approach with GPS or topographic maps is time-consuming and inconvenient. Therefore, this study combined the freely available virtual/digital globe with recent advancements of smartphone geo-browsers to develop a new sampling location track.ng approach. The sampling frame was developed with pre-uploaded point map formulated in GIS environment by combining land-use map and one-k.lometer grid with center coordinates. The sampling location grid was uploaded to smartphone and each point was track.d with Google Map path finder using point ID (coded grid coordinate) when searching each sampling location. The suitability of the new approach was tested for soil sample collection from paddy lands distributed in 0.9 million hectares in Sri Lank.. The sampling locations could be reached conveniently with the help of Google path-finder voice direction guide and optional routes. The efficiency of new approach was found to be remark.bly high, i.e., over 99% of the 9000 sampling points, which were spread across Sri Lank. having an area of 65,610 k.2. All sampling points in the country could be covered with twelve member field investigation crew who were guided through smartphones uploaded with sampling point grid on six motorbik.s within 60 days. The new sampling location track.ng approach is effective in terms of cost, time, human resource requirements, thus can be adopted in large-scale soil/plant sampling frames with high accuracy.

关键词： GIS GPS Geo-Browser Location Track.ng Sampling

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Use of Smartphones for Rapid Location Track.ng in Mega Scale Soil Sampling

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Open Journal of Applied Sciences（应用科学） 2021年第3期

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