diff --git a/asm/ground_map_1.s b/asm/ground_map_1.s
index 8cd5e2798..e25073566 100644
--- a/asm/ground_map_1.s
+++ b/asm/ground_map_1.s
@@ -5,51 +5,6 @@
 
 	.text
 
-	thumb_func_start GetAdjustedGroundMap
-GetAdjustedGroundMap:
-	push {r4,r5,lr}
-	lsls r0, 16
-	asrs r5, r0, 16
-	cmp r5, 0x9
-	beq _080A4D94
-	cmp r5, 0x9
-	bgt _080A4D90
-	cmp r5, 0x2
-	beq _080A4DB6
-	b _080A4DC4
-_080A4D90:
-	cmp r5, 0xC
-	bne _080A4DC4
-_080A4D94:
-	movs r0, 0
-	movs r1, 0x27
-	bl GetScriptVarValue
-	adds r4, r0, 0
-	movs r0, 0
-	movs r1, 0x28
-	bl GetScriptVarValue
-	lsls r1, r4, 1
-	adds r1, r4
-	lsls r1, 1
-	adds r1, r0
-	adds r1, r5, r1
-	lsls r1, 16
-	asrs r5, r1, 16
-	b _080A4DC4
-_080A4DB6:
-	movs r0, 0x6
-	bl sub_80023E4
-	lsls r0, 24
-	cmp r0, 0
-	beq _080A4DC4
-	movs r5, 0x3
-_080A4DC4:
-	adds r0, r5, 0
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end GetAdjustedGroundMap
-
 	thumb_func_start GroundMap_Select
 GroundMap_Select:
 	push {r4-r6,lr}
diff --git a/src/ground_map_1.c b/src/ground_map_1.c
index e2286d293..032b87125 100644
--- a/src/ground_map_1.c
+++ b/src/ground_map_1.c
@@ -1,5 +1,6 @@
 #include "global.h"
 #include "debug.h"
+#include "event_flag.h"
 #include "ground_main.h"
 #include "ground_map_1.h"
 #include "ground_script.h"
@@ -94,3 +95,27 @@ bool8 sub_80A4D48(s16 index)
     if (gGroundConversion_811BAF4[index].unk0 != 8) return TRUE;
     return FALSE;
 }
+
+s32 GetAdjustedGroundMap(s16 param_1)
+{
+    s32 iVar5;
+
+    iVar5 = param_1;
+
+    switch(iVar5)
+    {
+        case 9:
+        case 0xC:
+            iVar5 = (s16)(iVar5 + ((GetScriptVarValue(NULL, BASE_KIND) * 6) + GetScriptVarValue(NULL, BASE_LEVEL)));
+            break;
+        case 2:
+            if (sub_80023E4(6)) {
+                iVar5 = 3;
+            }
+            break;
+        default:
+            break;
+    }
+
+    return iVar5;
+}