Download presentation
Presentation is loading. Please wait.
Published byEdwin Reynolds Modified over 9 years ago
1
Welcome to Mapping Tom Sellsted – City of Yakima, Washington Vladimir Strinski – Hitech Systems
2
Objectives What is GIS? Why do we use GIS? Terminology Creating your own layers MapInfo / ESRI specific tools
3
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.
4
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.
5
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.
6
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
7
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
8
Database “Not Easy to Interpret”
9
Visualization “Worth a Thousand Words”
10
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.
11
Welcome to Mapping Terminology
12
Types of Features Vector Features –Points –Lines –Polygons Raster Features –Elevation Models –Imagery
13
Point Features
14
Line Features
15
Polygon Features
16
Raster Features
17
Composite Layers
18
Layer Table
19
Layer Table Geometry
21
Map Projection What is projection? Why do we need it? On the fly projection
22
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.
23
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.
24
On the Fly Projection Reprojects features automatically Imagery won’t reproject on the fly Great for AVL applications
25
Creating a Sample Map Using ESRI Products
26
Starting ArcMap
27
Setting Layers/Data Frame Properties
28
Set appropriate projection
29
Adding Layers Add Data
30
Adding Layers Dialog
31
Display photos
32
Add Streets
33
Configure Streets
34
Display Streets
35
With other Layers added
36
Create Map Layout
37
Show Map Layout
38
Add Map Elements
39
Complex Composition
40
For More Information: Tom E Sellsted City of Yakima, Washington tsellste@ci.yakima.wa.us http://www.ci.yakima.wa.us/gis
41
Sources of Data All departments contribute One central repository Ease of sharing Ease of maintenance Other agencies Vendors
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.