ObjectiveObjective : To Monitor Water Quality in the pipelines of a Water Treatment Plant (WTP) : To Monitor Water Quality in the pipelines of a Water Treatment Plant (WTP)

Requirements :

a. Map Windowb. Water Quality Datac. Pipe Network Map

GIS Knowledge Required :

a. How to digitizeb. How to create a Attribute Tablec. How to assign colors to data entered in the attribute table

Methodology :

a. The map of pipe network will be first digitized where line will represent pipe and elements in the pipe line like tanks, reservoirs, valves will be represented by point shapes.

b. As the objective is to represent water quality in the pipe lines, the attribute table of pipe shape file must have the water quality data. A field i.e. column or columns may be created to store the water quality data of one or more parameters. If the water quality at the elements are also required to be monitored separate attribute table for the elements will be created and water quality data at the elements will be entered in the respective fields.

c. The “Property” window will be used to create classes based on the water quality data. In case of quality parameters some ranges of data will represent impure water and other ranges may identify pure/moderate quality of the water. The classes will be require to created in such a way that the impure, near pure and pure range can be separated and represented distinctly.

d. The end product will classify the entire pipe network based on the water quality data where a layman can also identify the portion with impurities.

Digitizing with Mapwindow (www.mapwindow.org)

– Setting the Coordinate System– Adding Image for Digitization– Drawing Shape file– Legend Editor and Attribute Table– Label Setup– Merge or Remove ShapesMerge or Remove Shapes– MapWindowMapWindowTM Important Icons Important Icons– Other IconsOther Icons

1.Adding Coordinate System

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1.1.Setting The Coordinate System

File > Settings > Project Projection > Category/Group/Name

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Category > Geographic/Projected/Custom

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Show Mismatch Warnings ? > Yes (will show Mismatch warnings)/No (will hide mismatch warnings)

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Use Projection Info ? > Yes (project will use the projection info for each file)/No (will not use the projection )

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2.Adding Image for Digitization

Add the image. Image can be in any format (like : jpg,gif,tif..)

Click to create a new shape file. Name the shape file and select the location to save. Click Save to save the shapefile. Choose the shape file type i.e. point,line or polygon.

Click on the shp+ icon to start drawing shape files. Right click to finish drawing.

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3.Drawing Shape files

Half Drawn Shape file

Picture of Map was Taken From : www.mapofindia.com

Create line shape file for rivers, roads, telephone line etc.

Create a polygon shape file for lakes, land use, big rivers etc.

Create point shape file for cities, stations, post office, village etc.

3.1.Selecting Types of Shape file

Point shape file will have different ids and different location reference (i.e. coordinates)

3.2.Note

Polygon shape files have same id for all of its points and the first and last point of the polygon will always have the same location reference (i.e. coordinates)

Line shape files have same id for all of its points but the first and last point of a line will always have different location reference (i.e. coordinates)

You can identify this difference if you open the attribute table and look at MWShape id field

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The new shape files will be shown in the layer manager panel

Various types of values can be added to the shapefile with the help of Attribute Table. Any information stored in this table can be visualized or represented in the map.

VIEWING THE CREATED SHAPEFILES IN LAYER MANAGER

ADDING VALUES TO ATTRIBUTE TABLE

4.Legend Editor & Attribute Table

NOTE : The map legend will be look like the Layer manager and can be exported by Edit>Export >Legend whereas the entire map can be exported as a jpg/bmp image by Edit >Export > Map

Select Layer and Right Click to select Attribute Table Editor

4.1.Attribute Table

To Add New Fields i.e. columns to the table :

Edit > Add Field,

Select the data-type (string for text, integer for numbers, double for fraction number). Give a name and specify the field size. Click “Add” to add the field

You can also select a field and zoom to it by using View > Zoom to Selected Shapes. You can use the “Selection” Menu to Query the table values or use the “Export Selected Shapes” menu to export the selected features

Remember : Shapefiles consist shapes which are also called features)

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In Legend Editor window (select the shape file and click Properties) you can change the colour of the selected shape file; thickness of border of a polygon or thickness of a line shape file; transparency; vertex colour and size; line style; tool tip (when mouse is placed on the shape file the value of the file can be shown in the tool tip); legend picture (picture to be shown in the map legend) etc.

CHANGING THE COLOUR,STYLE AND DIMENSION OF CREATED SHAPE FILE WITH PROPERTY > LEGEND EDITOR

4.2.Legend Editor

4.2.1.Creation of Coloring Schemes

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Click + and assign MWShapeID. Change the colour by clicking on the colour box which will be shown under the “Color” column

Click lightning icon to create continuous color ramps of single or double colour. Range can be specified by you or automatically created by MapWindow based on your data. and assigned MWShapeID. Change the colour by clicking on the colour box which will be shown under the “Color” column

4.2.1.Creation of Coloring Elevation - 2

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Color Ramp is a ramp of colour from light to deepDifferent colours for different equal range

of values can be assigned if you choose this option .

Different colours for different values can be assigned if you choose this option .

5.Label Setup

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Field to Show in Label

Change the colour and alignment of the label

Prepend or Append to the Label

Change the Font Scale of the label And/or turn on/off Label Collision Avoidance

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Merge two Shapes

Remove shapes

6.Merge or Remove Shape file

Select Created Shapes11

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7.Important Icons

Add New Project

Open Old Project

Save the Project

Print the Map

Add New Layers or Remove/Clear All

Layers

Pan(move) the map Select a shape file within a layer. The layer must be active while selecting the shape-file

Measure Distance Between Two Points

Measure Area by drawing a polygon

Zoom in or Out or Zoom to Full Extent

8.Other Icons

Identifier i.e. click on any shapefile after selecting this icon to know the information stored into that shape file

Attribute table

Measures the distance and area of the shape files under the selected layers.

Create a new type of shape file. Often called as Shape file container

Starts to create a shapefile

Click to Remove Selected Shape file Merge two or more

shapefiles of same type

Move Vertices

Add(+) or Remove(-) Vertices