PottyProgrammer

Polygon Creation from text file (min xy, max xy) ISSUE

Discussion created by PottyProgrammer on Feb 20, 2014
Latest reply on Feb 20, 2014 by xander_bakker
We have been trying (for days) to create a polygon features from a CSV of min xy and max xy, held as GDA94 (lat,long) and it does not work for the majority of records.  Only one works.
I have added both the code and data.  We are creating the corresponding points to ensure the correct import and that works but when we Append to create the polygon it works but a feature of zero area is created.  There is no reported error in the script.

Python code

import arcpy, fileinput, os
from arcpy import env

env.overwriteOutput = True
infile = "C:/temp/M80/Metadata_RP.csv"

pt1 = arcpy.Point()
pt2 = arcpy.Point()
pt3 = arcpy.Point()
pt4 = arcpy.Point()
ptGeoms = []

point = arcpy.Point()
array = arcpy.Array()
featureList= []
curXY = arcpy.da.SearchCursor(infile, ["o_minx","o_miny","o_maxx","o_maxy"])

for row in curXY:
    message = "{0}, {1}, {2}, {3}".format(row[0], row[1], row[2], row[3])
    arcpy.AddMessage(message)
    o_minx= row[0]
    o_miny=row[1]
    o_maxx=row[2]
    o_maxy=row[3]
    message = "{0}, {1}, {2}, {3}".format(o_minx,o_miny,o_maxx,o_maxy)
   
    pt1.X = o_minx
    pt1.Y = o_miny
    ptGeoms.append(arcpy.PointGeometry(pt1))
    pt2.X = o_maxx
    pt2.Y = o_miny
    ptGeoms.append(arcpy.PointGeometry(pt2))
    pt3.X = o_maxx
    pt3.Y = o_maxy
    ptGeoms.append(arcpy.PointGeometry(pt3))
    pt4.X = o_minx
    pt4.Y = o_maxy
    ptGeoms.append(arcpy.PointGeometry(pt4))
    arcpy.AddMessage(message)
    array = arcpy.Array([pt1,pt2,pt3,pt4,pt1])

    polygon = arcpy.Polygon(array)
    featureList.append(polygon)
   
arcpy.CopyFeatures_management(featureList, r"C:/temp/M80/polys.shp")
arcpy.CopyFeatures_management(ptGeoms, r"C:/temp/M80/points.shp")

print arcpy.GetMessages()


CSV data
o_minx,o_miny,o_maxx,o_maxy
144.820900,-37.757700,144.827300,-37.755800
144.818700,-37.762200,144.823400,-37.759100
144.81900,-37.760800,144.824500,-37.758400
144.823800,-37.755800,144.829200,-37.753300
144.825500,-37.753400,144.832200,-37.75200
144.8209,-37.7577,144.8273,-37.7558
144.8187,-37.7622,144.8234,-37.7591
144.8268,-37.7524,144.8331,-37.7517
144.8292,-37.7506,144.8367,-37.7502
144.8203,-37.7621,144.8201,-37.761
144.8187,-37.7622,144.8234,-37.7591
144.8214,-37.7615,144.8224,-37.761
144.8192,-37.7622,144.8225,-37.7608
144.8209,-37.7577,144.8273,-37.7558
144.8187,-37.7622,144.8234,-37.7591

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