welcome to mapping tom sellsted – city of yakima, washington vladimir strinski – hitech systems

Welcome to Mapping

Tom Sellsted – City of Yakima, WashingtonVladimir Strinski – Hitech Systems

Objectives

What is GIS? Why do we use GIS? Terminology Creating your own layers MapInfo / ESRI specific tools

What is GIS?

Geography is information about the earth's surface and the objects found on it, as well as a framework for organizing knowledge. GIS is a technology that manages, analyzes, and disseminates geographic knowledge.

Three Views of a GIS- A Database View

A GIS is a unique kind of database of the world a geographic database (geodatabase). It is an "Information System for Geography." Fundamentally, a GIS is based on a structured database that describes the world in geographic terms.

Three Views of a GIS- A Map View

A GIS is a set of intelligent maps and other views that show features and feature relationships on the earth's surface. Maps of the underlying geographic information can be constructed and used as "windows into the database" to support queries, analysis, and editing of the information. This is called geovisualization.

Three Views of GIS- A Model View• A GIS is a set of

information transformation tools that derive new geographic datasets from existing datasets. These geoprocessing functions take information from existing datasets, apply analytic functions, and write results into new derived datasets

Geographic Information Systems

A method to visualize, manipulate, analyze and display spatial data

“Smart Maps” that link databases to a map

How many, what kinds, where are they?

Combine data from many different sources

80% of all data has some spatial component

Database “Not Easy to Interpret”

Visualization “Worth a Thousand Words”

Two Ways to Input and Visualize Data

Raster – Grid• “pixels”• A location and value• Satellite image and aerial photos are in this format

Vector – Linear• Points, Lines & Polygons• “Features” (house,lake, etc)

• Attributes• size, type, length, etc.

Welcome to MappingTerminology

Types of Features

Vector Features– Points– Lines– Polygons

Raster Features– Elevation Models– Imagery

Point Features

Line Features

Polygon Features

Raster Features

Composite Layers

Layer Table

Layer Table Geometry

Layer Table Geometry

Map Projection

What is projection? Why do we need it? On the fly projection

What is Map Projection?

A projection is a mathematical means of transferring information from the Earth's three-dimensional, curved surface to a two-dimensional medium—paper or a computer screen.

Why use Map Projection? Map layers come from different sources

An elevation image classified from a satellite image of Minnesota exists in a different scale and projection than the lines on the digital file of the State and Providence boundaries.

The elevation image has been reprojected to match the projection and scale of the State and Providence boundaries.

On the Fly Projection

Reprojects features automatically Imagery won’t reproject on the fly Great for AVL applications

Creating a Sample MapUsing ESRI Products

Starting ArcMap

Setting Layers/Data Frame Properties

Set appropriate projection

Adding Layers

Add Data

Adding Layers Dialog

Display photos

Add Streets

Configure Streets

Display Streets

With other Layers added

Create Map Layout

Show Map Layout

Add Map Elements

Complex Composition

For More Information:Tom E SellstedCity of Yakima, Washingtontsellste@ci.yakima.wa.ushttp://www.ci.yakima.wa.us/gis

Sources of Data

All departments contribute One central repository Ease of sharing Ease of maintenance Other agencies Vendors