ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2010 KEEP THIS TEXT BOX this slide...

ESRM 250 & CFR 520: Introduction to GIS

ESRM 250/CFR 520Winter, 2010Phil Hurvitz

(with thanks to J. Lawler & P. Schiess)

ArcMap Basics

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Overview

Getting data into ArcMap

Displaying layers

Layer display properties

ArcMap Basics

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Overview

Displaying layers

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ArcMap Basics

Layer feature types Spatial data sources for layers Data frames Adding a feature layer to a data frame Adding a layer from x,y coordinates Layer tables Map document

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Vector Data points (e.g., wells, utility poles, bird nests), lines (e.g., roads, streams, utility lines), polygons (e.g., cities, forest stands, PLSS

sections, counties)

Raster Data photographic, satellite, grids

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Getting data into ArcMap: Layer feature types

Spatial data sources for vector data ESRI geodatabases ESRI shapefiles ASCII files, database files GPS output And many many more

May require data conversion using ArcCatalog

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Getting data into ArcMap: Layers

Additional raster data sources for layers ERDAS Imagine Generic image formats

BSQ (band sequential), BIL (band interleave by line), and BIP (band interleave by pixel)

Sun raster files BMP Run-length compressed (RLC) files JPEG compressed images ArcInfo's image catalog ArcInfo grid Generic raster (ASCII, binary) and more….

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Getting data into ArcMap: Layers

Tabular data Can be added to your map document ESRI geodatabases SQL (structured query language) database

queries dBase format tables INFO tables Comma or tab delimited ASCII (text) files

comma separated values (csv files) tab-separated values or defined width (txt files)

OLEDB (object linking and embedding database) tables

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Getting data into ArcMap: Tables

A map document will always have at least 1 data frame (even if there are no layers present)

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Adding a data source to a data frame

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add databutton

All data sources are added in the same way

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ArcInfo coverage data

CAD data

Adding a data source to a data frame Icons indicate data type

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Polygon

Raster

Adding a data source to a data frame

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layer isadded

symbology

Adding a layer from x,y coordinates “event layer”

table must have X and Y value fields Field names cannot have spaces

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Adding a layer from x,y coordinates points are added to the map document

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Attribute tables

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Feature ID Shape

Geometry fieldsIdentification fields

User attribute fields Entity fields

Saving a map document (.mxd file) Save EARLY and OFTEN

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Saving your work

Overview

Displaying layers

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ArcMap Basics

Displaying layers Why alter layer display? What do you want to communicate?

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Displaying layers

raw population

population density

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Displaying layers: altering symbology

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Displaying layers: thematic mapping

Single symbol A single symbol for each feature Displays location/boundaries

Unique value Different symbol for each feature Shows variation in value

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Graduated color = “choropleth” Different symbol for each class Displays groups

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Chart symbol One chart symbol for each feature Good for comparing multiple attributes in

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Dot density One dot for a number of individuals For showing count/density for polygon data

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Graduated symbol Graduated symbol size Displays difference in magnitude

Classification methods

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Displaying layers

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Displaying layers: Classification methods

Jenks’ natural breaks Classes are created with breaks at

“natural” divisions in the data Display inherent

groupings orclumping

Histogram and statistics available

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Quantile Each class has about the same number of

members Good for uniformly distributed values

Equal interval Divides data values into equal-sized

subranges

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Standard deviation Classes show spread around the mean

value Displays variation in data

Normalization of data divides one field by another shows percentage,

proportion, or density

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raw populationpopulation density

10 classes

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Displaying layers: Manipulating classes

3 classes with custom labels

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Displaying layers: Manipulating classes

Legends & symbology are controlled with layer properties

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Displaying layers: Altering legends

Symbol selector

solid fill polygons; single symbol for

all polygons

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Displaying layers: Changing symbology

Changing symbology: polygons different colors for:

fill outline

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Predefined line symbols

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Predefined point marker symbols

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Fonts: All installed

TrueTypefonts are available

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Overview

Displaying layers

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ArcMap Basics

Defining layer subsets (definition query)

Setting scale thresholds

Labeling layer features

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Defining layer properties

Defining layer subsets by default, layers are composed of all

features

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An underlying query(“filter”) can be applied

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Defining layer properties: Subsets

only stands with age > 30 are shown

Setting scale thresholds allows layers to be displayed at specific

scale ranges

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Setting scale thresholds zooming will

cause featuresto (dis)appear

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Labeling features

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Readings: WWW: Getting Data Into ArcGIS Maps WWW: Displaying Layers WWW: Changing Layer Display Properties WWW: Sample Data Help: Help topics

Assignment #2 due 12:00 noon January 19, submit with Collect It

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Assignment

ESRM 250 & CFR 520: Introduction to GIS © Phil Hurvitz, 1999-2010 KEEP THIS TEXT BOX this slide...

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