MINIPROJECT ON

SYMBOLOGY AUTOMATION

USING ARCPY

Presented by:

Jyoti Dhakal (07)

Archana K.C (09)

Megha Shrestha (27)

Sushmita Timilsina (32)

Contents

Introduction

Objectives

Method used

Core code

Introduction GIS is a system of collecting, preparing, processing,

analysing, interpreting, evaluating and disseminating

geographical data to information.

“Python is an easy to learn, powerful language with high-

level data structures and a simple but effective approach to

object-oriented programming. Python’s elegant syntax and

dynamic typing make it an ideal language for scripting in

many areas and on most platforms.”

Why python in Arc GIS

Use scripting to develop, execute, and share geo-

processing workflows

Improves productivity

OBJECTIVE

To automate the Symbology process in Arc GIS no

matter what type the input is

Module used

arcpy.mapping()

arcpy.mapping provides ability to automate updating of

map documents components such as layers, layout elements

without the need of opening every single documents.

GUI

Python provides various options for developing graphical

user interfaces (GUIs). We are using Tkinter for our mini

project:

Tkinter: Tkinter is the Python interface to the Tk GUI

toolkit shipped with Python.

Methods used mxd=arcpy.mapping.MapDocument(r"Current")

mxd.save() #saving map document

arcpy.mapping.ListDataFrames(mxd)

arcpy.RefreshActiveView()

arcpy.mapping.ListLayers(mxd, '*', change_view)

Contd…

arcpy.mapping.InsertLayer(change_view, refLayer,

insertLayer, "BEFORE")

arcpy.Describe()

arcpy.ApplySymbologyFromLayer_management()

CORE CODE

if type == "Polygon":

arcpy.ApplySymbologyFromLayer_management(ins_lyr, r"E:\kam

haru\4th year 2nd sem\python\mini_projectdata\Zones.lyr")

elif type == "Polyline":

arcpy.ApplySymbologyFromLayer_management(ins_lyr, r"E:\kam

haru\4th year 2nd sem\python\mini_projectdata\Roads.lyr")

elif type == "Point":

arcpy.ApplySymbologyFromLayer_management(ins_lyr, r"E:\kam

haru\4th year 2nd sem\python\mini_projectdata\Settlements.lyr")

APPLICATION

This program will be highly applicable when we

are doing same process again and again several

time for similar type of data to obtain similar type

of output