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Utilization of Geoinformatics to Assess Encroachment Areas in Phu Soi Dao National Park, Uttaradit Province |
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| รหัสดีโอไอ | |
| Creator | Wuttipong Ninjun |
| Title | Utilization of Geoinformatics to Assess Encroachment Areas in Phu Soi Dao National Park, Uttaradit Province |
| Contributor | Pharuit Jaitaskul,Thidapath Anucharn,Niti Iamchuen |
| Publisher | School of Information and Communication Technology, University of Phayao |
| Publication Year | 2567 |
| Journal Title | The Journal of Spatial Innovation Development |
| Journal Vol. | 5 |
| Journal No. | 1 |
| Page no. | 109-123 |
| Keyword | Encroachment, Vegetation index, Phu Soi Dao National Park, GIS, Threshold value |
| URL Website | https://ph01.tci-thaijo.org/index.php/jsid/index |
| Website title | The Journal of Spatial Innovation Development |
| ISSN | 2730-1494 |
| Abstract | The objective of this study was to examine the threshold value of the Vegetation Index for the purpose of identifying areas that are susceptible to invasion. To enhance efficiency and cost-effectiveness in the analysis of areas where forests are expanding. By analyzing the Normalized Differential Vegetation Index (NDVI) data received from Sentinel-2B satellite images and qualitative reconnaissance survey points on forest encroachment (SMART data) between 2020 and 2023. The first segment is allotted for the purpose of acquiring knowledge, with a training set of 60 points. The following segment is dedicated for validation, with a testing set of 40 points. The initial segment data is obtained from survey stations that indicate territorial encroachments. Forestry employs the Vegetation Index to evaluate the magnitude of hazardous regions by extracting valuable data. The invasion is quantified by computing the monthly means, which are representative of the full year. This is achieved by considering the maximum and minimum index values for each month. The study's findings suggest that the month of July has the highest monthly threshold value, namely at 0.384821. The February threshold value is 0.098974, the lowest among all months. The February monthly average falls between the values of 0.141287 and 0.244678. Acquire the spectrum of average monthly vegetation index values. The threshold value delineates the demarcation between regions that are prone to invasion and regions that are not prone to invasion. A grand total of 67,096 rai of land were recognized as being susceptible to encroachment, whilst 146,115 rai were deemed to be devoid of such risk. The first percentage represents 31.47% of the total area, while the second percentage represents 68.53% of the whole area. In the second stage, the locations that are prone to encroachment were overlaid with the regions that are not prone to encroachment, using a specific range of values as a threshold. A total of 40 survey locations were discovered within areas prone to encroachment, whereas 32 points were located within these areas. Unauthorized access is not possible at 8 specified places, which account for 85 percent and 15 percent, respectively. The aforementioned threshold range can be employed in the strategic planning of future area patrols to optimize efficacy. |
