{
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    [221,"M    ","M1","M101     "],
    [222,"พื้นที่เบ็ดเตล็ด",null,"M102     "],
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    [242,null,null,null],
    [243,"หมายเหตุ :",null,null],
    [244,"1) การเขียนสัญลักษณ์ผสม ใช้เครื่องหมายดังนี้ :-",null,null],
    [245,"    X/Y  พื้นที่การใช้ประโยชน์ที่ดิน 2 ชนิด ในอัตราส่วนประมาณ 50% ต่อ 50%",null,null],
    [246,"    X+Y พื้นที่การใช้ประโยชน์ที่ดิน 2 ชนิดต่อเนื่องกัน โดยมีพืช x เป็นพื้นที่หลักหรือเป็นพืชที่มีความสำคัญทางเศรษฐกิจ",null,null],
    [247,"           มากกว่าพืช Y คำนวณเนื้อที่เฉพาะ X",null,null],
    [248,"2) พื้นที่ที่เคยทำเกษตรกรรมแต่ปล่อยทิ้งร้างมานาน เนื่องจากดินไม่เหมาะสม หรือพื้นที่ที่ดินมีความอุดมสมบูรณ์ต่ำโดย",null,null],
    [249,"    ธรรมชาติ ใช้สัญลักษณ์ M101 สำหรับพื้นที่ที่มีหญ้าเป็นส่วนใหญ่  M102 สำหรับพื้นที่ที่เป็นไม้พุ่มหรือสลับหญ้าธรรมชาติ",null,null],
    [250,"    บางส่วน  M201  สำหรับพื้นที่ที่มีพืชน้ำหรือวัชพืชน้ำขึ้น  และ M403 สำหรับพื้นที่หินโผล่",null,null],
    [251,"3) ขนาดของหน่วยแผนที่การใช้ที่ดินที่เล็กที่สุดสำหรับลงบนแผนที่คือ 0.25 ตารางเซนติเมตรทุกมาตราส่วน (0.5x0.5 ซม. หรือพื้นที่ 40 ไร่ ",null,null],
    [252,"    บนแผนที่มาตราส่วน 1 : 50,000 หรือพื้นที่ 10 ไร่ บนแผนที่มาตราส่วน 1 : 25,000)",null,null],
    [253,"4) แผนที่โครงการชลประทานได้มาจาก กรมชลประทาน และหน่วยงานอื่นที่รับผิดชอบ  สำหรับพื้นที่ที่มีการชลประทาน",null,null],
    [254,"    ใส่ I ไว้ตรงหน้าสัญลักษณ์ เฉพาะงานระดับโครงการพิเศษ เท่านั้น",null,null],
    [255,"5) * ใช้ในการจำแนกแผนที่การใช้ที่ดินมาตราส่วนใหญ่ ตั้งแต่ 1:4,000 ขึ้นไป เท่านั้น",null,null],
    [256,null,null,null],
    [257,null,null,null],
    [258,null,null,null],
    [259,null,null,null],
    [260,null,null,null]
]}