{"id":820,"date":"2020-06-18T07:16:00","date_gmt":"2020-06-18T00:16:00","guid":{"rendered":"http:\/\/www.gis2me.com\/geospatial\/?p=820"},"modified":"2025-04-30T09:24:35","modified_gmt":"2025-04-30T02:24:35","slug":"r-studio-ep12-%e0%b8%aa%e0%b8%a3%e0%b9%89%e0%b8%b2%e0%b8%87-dem-%e0%b8%95%e0%b8%ad%e0%b8%99%e0%b8%97%e0%b8%b5%e0%b9%881-3-%e0%b8%88%e0%b8%b2%e0%b8%81%e0%b8%82%e0%b9%89%e0%b8%ad%e0%b8%a1","status":"publish","type":"post","link":"http:\/\/www.gis2me.com\/geospatial\/?p=820","title":{"rendered":"R-studio : ( EP#12 ) \u0e2a\u0e23\u0e49\u0e32\u0e07 DEM (\u0e15\u0e2d\u0e19\u0e17\u0e35\u0e481\/3) \u0e08\u0e32\u0e01\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 Excel \u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07 \u0e14\u0e49\u0e27\u0e22\u0e42\u0e1b\u0e23\u0e41\u0e01\u0e23\u0e21 R"},"content":{"rendered":"<p>R-studio : ( EP#12 ) \u0e2a\u0e23\u0e49\u0e32\u0e07 DEM (\u0e15\u0e2d\u0e19\u0e17\u0e35\u0e481\/3) \u0e08\u0e32\u0e01\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 Excel \u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07 \u0e14\u0e49\u0e27\u0e22\u0e42\u0e1b\u0e23\u0e41\u0e01\u0e23\u0e21 R<br \/>\u0e43\u0e19\u0e15\u0e2d\u0e19 <strong data-start=\"6\" data-end=\"24\">R-Studio EP#12<\/strong> \u0e19\u0e35\u0e49 \u0e40\u0e23\u0e32\u0e08\u0e30\u0e40\u0e23\u0e34\u0e48\u0e21\u0e15\u0e49\u0e19\u0e01\u0e23\u0e30\u0e1a\u0e27\u0e19\u0e01\u0e32\u0e23 <strong data-start=\"52\" data-end=\"114\">\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e41\u0e1a\u0e1a\u0e08\u0e33\u0e25\u0e2d\u0e07\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07\u0e40\u0e0a\u0e34\u0e07\u0e40\u0e25\u0e02 (Digital Elevation Model: DEM)<\/strong> \u0e08\u0e32\u0e01 <strong data-start=\"119\" data-end=\"144\">\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e1e\u0e34\u0e01\u0e31\u0e14\u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07<\/strong> \u0e17\u0e35\u0e48\u0e1a\u0e31\u0e19\u0e17\u0e36\u0e01\u0e43\u0e19\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a <strong data-start=\"163\" data-end=\"177\">Excel file<\/strong> \u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49\u0e20\u0e32\u0e29\u0e32 R \u0e0b\u0e36\u0e48\u0e07\u0e40\u0e2b\u0e21\u0e32\u0e30\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e19\u0e31\u0e01\u0e27\u0e34\u0e40\u0e04\u0e23\u0e32\u0e30\u0e2b\u0e4c\u0e40\u0e0a\u0e34\u0e07\u0e1e\u0e37\u0e49\u0e19\u0e17\u0e35\u0e48\u0e17\u0e35\u0e48\u0e15\u0e49\u0e2d\u0e07\u0e01\u0e32\u0e23\u0e1b\u0e23\u0e30\u0e21\u0e27\u0e25\u0e1c\u0e25 DEM \u0e41\u0e1a\u0e1a\u0e2d\u0e34\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e08\u0e23\u0e34\u0e07\u0e08\u0e32\u0e01\u0e20\u0e32\u0e04\u0e2a\u0e19\u0e32\u0e21<\/p>\n<p>\u0e40\u0e15\u0e23\u0e35\u0e22\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07 \u0e40\u0e1e\u0e37\u0e48\u0e2d\u0e19\u0e33\u0e21\u0e32\u0e08\u0e33\u0e25\u0e2d\u0e07\u0e40\u0e1b\u0e47\u0e19 Digital Elevation Model \u0e14\u0e49\u0e27\u0e22\u0e42\u0e1b\u0e23\u0e41\u0e01\u0e23\u0e21 R<\/p>\n<p>\u0e41\u0e2b\u0e25\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 R markdown script \u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a DEM # 1\/3 <a href=\"https:\/\/drive.google.com\/file\/d\/1uw4KgaVd1-H4DvqWUwvaJbZhKcuH5bco\/view?usp=sharing\">\u00a0 <br \/>https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSdmg9HzkwC3eDkXvHkxDWieKEFpTzAzho9i9HEh2XZmCheoFQ\/viewform <br \/><\/a><\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/8Air8NyaM5E\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udded \u0e27\u0e31\u0e15\u0e16\u0e38\u0e1b\u0e23\u0e30\u0e2a\u0e07\u0e04\u0e4c\u0e02\u0e2d\u0e07 EP#12 (\u0e15\u0e2d\u0e19\u0e17\u0e35\u0e48 1\/3)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e40\u0e15\u0e23\u0e35\u0e22\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e08\u0e38\u0e14\u0e1e\u0e34\u0e01\u0e31\u0e14 + \u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07 (X, Y, Z) \u0e08\u0e32\u0e01 Excel<\/li>\n\n\n\n<li>\u0e41\u0e1b\u0e25\u0e07\u0e43\u0e2b\u0e49\u0e2d\u0e22\u0e39\u0e48\u0e43\u0e19\u0e23\u0e39\u0e1b Spatial Data<\/li>\n\n\n\n<li>\u0e40\u0e23\u0e35\u0e22\u0e19\u0e23\u0e39\u0e49\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19\u0e01\u0e32\u0e23\u0e41\u0e2a\u0e14\u0e07\u0e1c\u0e25\u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07<\/li>\n\n\n\n<li>\u0e1b\u0e39\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19\u0e2a\u0e39\u0e48\u0e01\u0e32\u0e23\u0e2a\u0e23\u0e49\u0e32\u0e07 DEM \u0e14\u0e49\u0e27\u0e22 Interpolation \u0e43\u0e19\u0e15\u0e2d\u0e19\u0e15\u0e48\u0e2d\u0e44\u0e1b<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udce5 \u0e14\u0e32\u0e27\u0e19\u0e4c\u0e42\u0e2b\u0e25\u0e14 R Markdown Script<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0e41\u0e1a\u0e1a\u0e1f\u0e2d\u0e23\u0e4c\u0e21\u0e23\u0e31\u0e1a\u0e2a\u0e04\u0e23\u0e34\u0e1b\u0e15\u0e4c\u0e15\u0e2d\u0e19\u0e17\u0e35\u0e48 1:<br>\ud83d\udd17 <a class=\"\" href=\"https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSdmg9HzkwC3eDkXvHkxDWieKEFpTzAzho9i9HEh2XZmCheoFQ\/viewform\">DEM (EP#12 \u2013 \u0e15\u0e2d\u0e19\u0e17\u0e35\u0e48 1\/3)<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\uddc2\ufe0f \u0e42\u0e04\u0e23\u0e07\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 Excel \u0e17\u0e35\u0e48\u0e43\u0e0a\u0e49<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>longitude<\/th><th>latitude<\/th><th>elevation<\/th><\/tr><\/thead><tbody><tr><td>100.12345<\/td><td>13.45678<\/td><td>120.5<\/td><\/tr><tr><td>100.12456<\/td><td>13.45789<\/td><td>122.7<\/td><\/tr><tr><td>\u2026<\/td><td>\u2026<\/td><td>\u2026<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddea \u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07 R Code \u0e40\u0e1a\u0e37\u0e49\u0e2d\u0e07\u0e15\u0e49\u0e19<\/h2>\n\n\n\n<pre class=\"wp-block-preformatted\">rCopyEdit<code># \u0e15\u0e34\u0e14\u0e15\u0e31\u0e49\u0e07\u0e41\u0e1e\u0e47\u0e01\u0e40\u0e01\u0e08\u0e17\u0e35\u0e48\u0e08\u0e33\u0e40\u0e1b\u0e47\u0e19\ninstall.packages(c(\"readxl\", \"sp\", \"ggplot2\"))\n\n# \u0e42\u0e2b\u0e25\u0e14\u0e41\u0e1e\u0e47\u0e01\u0e40\u0e01\u0e08\nlibrary(readxl)\nlibrary(sp)\nlibrary(ggplot2)\n\n# \u0e2d\u0e48\u0e32\u0e19\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e08\u0e32\u0e01 Excel\nelevation_data &lt;- read_excel(\"elevation_points.xlsx\")\n\n# \u0e15\u0e23\u0e27\u0e08\u0e2a\u0e2d\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\nhead(elevation_data)\n\n# \u0e2a\u0e23\u0e49\u0e32\u0e07 SpatialPointsDataFrame\ncoordinates(elevation_data) &lt;- ~longitude + latitude\nproj4string(elevation_data) &lt;- CRS(\"+proj=longlat +datum=WGS84\")\n\n# \u0e1e\u0e25\u0e47\u0e2d\u0e15\u0e08\u0e38\u0e14\u0e04\u0e27\u0e32\u0e21\u0e2a\u0e39\u0e07\nggplot(as.data.frame(elevation_data), aes(x = longitude, y = latitude, color = elevation)) +\n  geom_point(size = 2) +\n  scale_color_viridis_c() +\n  theme_minimal() +\n  labs(title = \"Elevation Points from Field Survey\", color = \"Elevation (m)\")\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udfaf \u0e2a\u0e34\u0e48\u0e07\u0e17\u0e35\u0e48\u0e04\u0e27\u0e23\u0e40\u0e15\u0e23\u0e35\u0e22\u0e21\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e15\u0e2d\u0e19\u0e16\u0e31\u0e14\u0e44\u0e1b (EP#13 \u0e41\u0e25\u0e30 EP#14)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e28\u0e36\u0e01\u0e29\u0e32\u0e41\u0e19\u0e27\u0e04\u0e34\u0e14 <strong>\u0e01\u0e32\u0e23\u0e17\u0e33 Interpolation<\/strong> \u0e40\u0e0a\u0e48\u0e19 IDW \u0e2b\u0e23\u0e37\u0e2d Kriging<\/li>\n\n\n\n<li>\u0e15\u0e34\u0e14\u0e15\u0e31\u0e49\u0e07\u0e41\u0e1e\u0e47\u0e01\u0e40\u0e01\u0e08 <code>gstat<\/code>, <code>raster<\/code>, <code>sf<\/code><\/li>\n\n\n\n<li>\u0e40\u0e15\u0e23\u0e35\u0e22\u0e21\u0e44\u0e1f\u0e25\u0e4c shapefile \u0e02\u0e2d\u0e1a\u0e40\u0e02\u0e15\u0e1e\u0e37\u0e49\u0e19\u0e17\u0e35\u0e48\u0e28\u0e36\u0e01\u0e29\u0e32 (\u0e16\u0e49\u0e32\u0e21\u0e35)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2728 \u0e1b\u0e23\u0e30\u0e22\u0e38\u0e01\u0e15\u0e4c\u0e43\u0e0a\u0e49\u0e07\u0e32\u0e19 DEM \u0e17\u0e35\u0e48\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e44\u0e14\u0e49<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0e01\u0e32\u0e23\u0e27\u0e34\u0e40\u0e04\u0e23\u0e32\u0e30\u0e2b\u0e4c\u0e41\u0e19\u0e27\u0e25\u0e32\u0e14\u0e0a\u0e31\u0e19\u0e41\u0e25\u0e30\u0e17\u0e34\u0e28\u0e17\u0e32\u0e07\u0e25\u0e32\u0e14 (Slope &amp; Aspect)<\/li>\n\n\n\n<li>\u0e01\u0e32\u0e23\u0e08\u0e33\u0e25\u0e2d\u0e07\u0e40\u0e2a\u0e49\u0e19\u0e17\u0e32\u0e07\u0e01\u0e32\u0e23\u0e44\u0e2b\u0e25\u0e02\u0e2d\u0e07\u0e19\u0e49\u0e33 (Hydrologic Flow Modeling)<\/li>\n\n\n\n<li>\u0e01\u0e32\u0e23\u0e2a\u0e23\u0e49\u0e32\u0e07 3D Surface map \u0e2b\u0e23\u0e37\u0e2d Heatmap<\/li>\n\n\n\n<li>\u0e01\u0e32\u0e23\u0e17\u0e33 Overlay \u0e01\u0e31\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e01\u0e32\u0e23\u0e43\u0e0a\u0e49\u0e17\u0e35\u0e48\u0e14\u0e34\u0e19 \u0e2b\u0e23\u0e37\u0e2d\u0e42\u0e04\u0e23\u0e07\u0e2a\u0e23\u0e49\u0e32\u0e07\u0e1e\u0e37\u0e49\u0e19\u0e10\u0e32\u0e19<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>R-studio : ( EP#12 ) \u0e2a\u0e23\u0e49\u0e32\u0e07 DEM (\u0e15\u0e2d\u0e19\u0e17\u0e35\u0e481\/3) \u0e08\u0e32\u0e01\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25 Ex [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[21],"tags":[518,503,511,526,451,440,439,530,528,527,532,531,529],"class_list":["post-820","post","type-post","status-publish","format-standard","hentry","category--r-studio","tag-dem-r","tag-digital-elevation-model","tag-elevation-data","tag-excel-to-gis","tag-ggplot2-map","tag-gis--r","tag-r-studio","tag-r--dem","tag-r-","tag-spatial-points-r","tag-x-y-z-excel-to-dem","tag--spatial-data","tag--r"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/posts\/820","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=820"}],"version-history":[{"count":1,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/posts\/820\/revisions"}],"predecessor-version":[{"id":821,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=\/wp\/v2\/posts\/820\/revisions\/821"}],"wp:attachment":[{"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=820"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gis2me.com\/geospatial\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}