By Laura Tateosian
This publication introduces Python scripting for geographic info technological know-how (GIS) workflow optimization utilizing ArcGIS. It builds crucial programming abilities for automating GIS research. Over 2 hundred pattern Python scripts and a hundred seventy five classroom-tested workouts make stronger the educational pursuits. Readers will learn how to: • Write and run Python within the ArcGIS Python Window, the PythonWin IDE, and the PyScripter IDE • paintings with Python syntax and information kinds • name ArcToolbox instruments, batch technique GIS datasets, and manage map files utilizing the arcpy package deal • learn and adjust proprietary and ASCII textual content GIS information • Parse HTML websites and KML datasets • Create websites and fetch GIS facts from internet assets. • construct user-interfaces with the local Python dossier conversation toolkit or the ArcGIS Script instruments and PyToolboxes Python for ArcGIS is designed as a major textbook for advanced-level scholars in GIS. Researchers, govt experts and pros operating in GIS also will locate this e-book beneficial as a reference.
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5 + 6 # adding two numbers together 11 >>> '5' + '6' # concatenating two strings '56' >>> rasterName = 'NorthEast' >>> route = 'ATrain' >>> output = rasterName + route >>> output 'NorthEastATrain'br /> Both of the variables being concatenated must be string types or you’ll get a TypeError. For example, using the plus sign between a numeric variable and a string variable causes an error. Python doesn’t know whether to perform addition or concatenation. 44 3 Basic Data Types: Numbers and Strings >>> i = 1 >>> rasterName = 'NorthEast' >>> output = rasterName + i Traceback (most recent call last): File "
Py’ as it appears in an IDE. 2) runs. 3 shows the script as it is displayed with the default settings in PythonWin. The italic text, bold text, and indentation correspond to comments, keywords, and block structures, respectively. These components along with variables and assignment statements are discussed next. 1 Comments Text lines shown in italics by the IDE are comments, information only included for humans readers, not for the computer to interpret. Anything that follows one or more hash sign (#) on a line of Python code is a comment and is ignored by the computer.
Differentiate between integer and floating point number division. Determine the data type of a variable. Index into, slice, and concatenate strings. Find the length of a string and check if a substring is contained in a string. Replace substrings, modify text case in strings, split strings, and join items into a single string. Differentiate between string variables and string literals. Locate online help for the specialized functions associated with strings. Create strings that represent the location of data.