Conventions_Programming ArcGIS 10.1 with Python Cookbook-QQ阅读轻小说男生网

书名：Programming ArcGIS 10.1 with Python Cookbook
作者名：Eric Pimpler
本章字数：273字
更新时间：2025-02-28 02:27:59

Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: " we have loaded the ListFeatureClasses.py script with IDLE."

A block of code is set as follows:

import arcpy
fc = "c:/ArcpyBook/data/TravisCounty/TravisCounty.shp"
# Fetch each feature from the cursor and examine the extent properties and spatial reference
for row in arcpy.da.SearchCursor(fc, ["SHAPE@"]):
  # get the extent of the county boundary
  ext = row[0].extent
  # print out the bounding coordinates and spatial reference
  print "XMin: " + ext.XMin
  print "XMax: " + ext.XMax
  print "YMin: " + ext.YMin
  print "YMax: " + ext.YMax
  print "Spatial Reference: " + ext.spatialReference.name

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

import arcpy

fc = "c:/data/city.gdb/streets"

# For each row print the Object ID field, and use the SHAPE@AREA
# token to access geometry properties

with arcpy.da.SearchCursor(fc, ("OID@", "SHAPE@AREA")) as cursor:
  for row in cursor:
    print("Feature {0} has an area of {1}".format(row[0], row[1]))

Any command-line input or output is written as follows:

[<map layer u'City of Austin Bldg Permits'>, <map layer u'Hospitals'>, <map layer u'Schools'>, <map layer u'Streams'>, <map layer u'Streets'>, <map layer u'Streams_Buff'>, <map layer u'Floodplains'>, <map layer u'2000 Census Tracts'>, <map layer u'City Limits'>, <map layer u'Travis County'>]

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "go to Start | Programs | ArcGIS | Python 2.7 | IDLE".

Conventions

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