University of Tehran Forest and Wood Products 5052-2008 67 3 2014 09 23 Efficiency of Kriging for Estimation and Mapping of Crown Cover and Density of Zagros Oak Forests (Case study: Dadabad Region, Khorramabad) Efficiency of Kriging for Estimation and Mapping of Crown Cover and Density of Zagros Oak Forests (Case study: Dadabad Region, Khorramabad) 359 370 52083 10.22059/jfwp.2014.52083 FA Effat Rezaei M.Sc. Student, Islamic Azad University, Science and Research Branch, Tehran, I.R. Iran Reza Akhavan Assistant Professor, Forest Research Division, Research Institute of Forests and Rangelands, Tehran, I.R. Iran 0000-0003-3420-7301 Javad Soosani Assistant Professor, Faculty of Agriculture, University of Lorestan, I.R. Iran Mehdi Pourhashemi Assistant Professor, Forest Research Division, Research Institute of Forests and Rangelands, Tehran, I.R. Iran Journal Article 2013 07 28 Estimation and mapping of forest resources is a precondition for management, planning and research.<br />This research was conducted to investigate the spatial structure and estimation of crown cover and<br />density of an oak forest in the west of Iran (Loristan province) using kriging interpolation method of<br />geostatistics. Field sampling was performed based on a 100 m×100 m systematic grid using 2000 m2<br />circular samples. Overall, 80 sample plots were measured in 80 hectare. Experimental variograms for<br />forest stem density and crown cover were calculated and plotted using the geo-referenced inventory<br />plots. The calculated variogram of stem density and crown cover showed strong spatial<br />autocorrelation, which fitted by Gaussian model. Estimations were made by ordinary block (45 m×45<br />m) kriging. Cross-validation results showed that all the estimations are unbiased. Therefore, kriging<br />have the potential to more accurately estimate and map the crown cover and density of this kind of<br />coppice forests, accurately. Estimation and mapping of forest resources is a precondition for management, planning and research.<br />This research was conducted to investigate the spatial structure and estimation of crown cover and<br />density of an oak forest in the west of Iran (Loristan province) using kriging interpolation method of<br />geostatistics. Field sampling was performed based on a 100 m×100 m systematic grid using 2000 m2<br />circular samples. Overall, 80 sample plots were measured in 80 hectare. Experimental variograms for<br />forest stem density and crown cover were calculated and plotted using the geo-referenced inventory<br />plots. The calculated variogram of stem density and crown cover showed strong spatial<br />autocorrelation, which fitted by Gaussian model. Estimations were made by ordinary block (45 m×45<br />m) kriging. Cross-validation results showed that all the estimations are unbiased. Therefore, kriging<br />have the potential to more accurately estimate and map the crown cover and density of this kind of<br />coppice forests, accurately. https://jfwp.ut.ac.ir/article_52083_960c54371f1e738eab8b46c36acf36fe.pdf