代码片段

过滤字段

• 仅限制长度

def test(Contour, Shape_Length):
    Contour = float(round(Contour, 2))
    length = int(Shape_Length)
    limt = 1000

    if length >= limt:
        if Contour==0:
            return "流速不变"
        elif Contour>0:
            return "流速增大"
        else:
            return "流速减少"
    else:
        return ""

test(!Contour!, !Shape_Length!)

限制长度和等值线范围

def test(Contour, Shape_Length):
    Contour = float(round(Contour, 2))
    length = round(Shape_Length, 2)
    limt = 900
    contour_limt = [0, 0.01, -0.01, 0.03, -0.03]
    
    if length >= limt and Contour in contour_limt:
        if Contour == 0:
            return "流速不变"
        elif Contour > 0:
            return "流速增大"
        else:
            return "流速减少"
    return ""

test(!Contour!, !Shape_Length!)

仅过滤流速变化

def test(Contour):
    Contour = float(round(Contour, 2))

    if Contour == 0:
        return "流速不变"
    elif Contour> 0:
        return "流速增大"
    else:
        return "流速减少"

test(!Contour!)

标注相关

根据某字段显示

// 假设当前字段名称为 
// static字段，记录了三种状态
// 流速增大、流速不变、流速减小
// 就算字段为空，在length中也会显示为1，所以指定为4的才显示
function FindLabel ( [static], [Contour] )
{
  tar = [static].toString()
  if( tar.length == 4 ) { return [Contour] }
  return ""; 
}

// 添加条件限制
function FindLabel ( [static], [Contour], [Shape_Length] )
{
  var tar = [static].toString()
  var limt = 300
  
  if(tar != "" && [Shape_Length] >= limt) return [Contour]
  
  return ""; 
}