01 arcgis arcmap intro

7/30/2019 01 ArcGIS ArcMap Intro

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CEE 173/273 Watershed Modeling. University of California, Irvine. Tutorial Series: ArcGIS & Relevant Extensions 1

Uses of ArcGISArcGIS Desktop is a comprehensive set of professional GIS used to

Work with mapsCompile, edit, and maintain geographic dataAutomate work tasks with geoprocessingAnalyze and model data using geoprocessingVisualize and display of results in maps, and 3D views,Other tasks such as data documentation, services, and advanced geospatial processing

ArcGIS includes a suite ofapplications. Most of theseapplications can be launchedfrom within each others.

Manage data sets, create meta-data (data aboutdata), and

Provides seamless integration and multi-resolutionglobal map analysis and visualization. Part of Arc-3DAnalysis

Is the main environment and interface for working

with maps, data analysis, and other GIS tools. We willuse it heavily

Provides environment for working with 3D data andviews. Also part of Arc-3D analyst extension

ArcGIS Applications

ArcGIS Extensions

Extensions allow users to perform tasks such as raster geoprocessing (Spatial Analyst) and three-dimensional analysis (3DAnalyst). Extensions also allow the integration of other codes (visual basic, C++, and other compiled languages) into theArcGIS environment. Some extension, utilize other extensions to perform specific tasks such as hydrologic data analysis andmanagement (ArcHydro) and model specific configuration and parameterization (connect GIS data bases to other models).Among these are HEC-GEOHSM (main and project views) and HEC-GeoRAS. Both commercial and public domain third partyextensions are available.


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Feature Data

Points can have (x,y) coordinates, (x,y,z)coordinates, and (x,y,m) coordinates with mbeing the third dimension (cam be time,distance, or any measure) Raster Data

Raster are regularly spaced grids. Images aretypes of (multi-band) raster. Rasters aregenerally identified by corner locations of the

data set, size of grid, and units of themeasure (elevation, reflectivity, etc) Tabular Data

Tables connect information to geographicfeatures and allow relational queries andprocessing

GIS Data Types


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Geo Database

A Geodatabase is a physical instance of a collection of datasets, that has

1. Acomprehensive information model for representing and managinggeographic information

2. A software logic to provide the methods and models for accessing andworking with geographic data in a variety of files and formats.

3. A transaction model for managing GIS data workflows.


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ArcMap: Starting ArcMap

1. Click on the Start button in Windows and Go to

2. Once ArcMap starts, you will get the abovedialogue, Selcet the A new empty map radiobutton

Map Display Area

Table of Content

Anchored toolbars area

3. Toolbars in ArcMap are flexible and can be moved around same asin most modern windows applications. Click on the left side of the toolbar with the icons (standard toolbar) and drag it any where, it can be afloating toolbar

Important Tools:

Add layer to map

Save map document

Open Arc ToolBox

Open Command Line Editor


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1. From the main menu, select

2. In the dialogue box, make sure that 3D Analyst, GeostatisticalAnalyst, and Spatial Analyst are selected.

This will not load their corresponding tool bars visible, but it will makethese extensions available to ArcMap.

To activate an extension To add a toolbar:

1. With the right mouse button click anywhere in theanchored toolbars area. From the list select the desired toolbar. For example, select the toolbar

When first selected, toolbars maybe floating, you can arrange themas you like

Zoom in

Zoom out

Zoom in to center of map

Zoom out to center of map

Pan map. Move entire map

Zoom to full map extent

Previous extent view

Next extent view

Select feature by clicking on it

Unselect featureSelect element

See Attributes for feature

Find features

Go to location

Measure length

If feature has hyperlink, triger

ArcMap: Adding Extensions and Toolbars


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During the reminder of this exercise we will be workingwith data set from a small water shed in Orange County,CA. The watershed is called Trabuco Canyon.

Step 1. Create Directory to save your data

In Drive D:\CEE73\, which we have created in previouslabs, create a new folder and call it TRAB (for Trabuco)

Step 2: Download the file :

http://hydis.eng.uci.edu/wsmodeling/data/Trab_08.zipinto the directory D:\CEE173\Trabuco\ which you havejust created

Step 3: Extract the data into

D:\CEE273\Trabuco\Trab_08\In windows explorer, the directory structure afterextraction will look like

Step 4: Start ArcMap

Using (Start ArcGIS ArcMap) start ArcMap andcreate the a new empty map radio button wait for

ArcMap to load.

Step 5. Add layers to the Map

a. Click the (add layer) button form the standard menub. In the Add Data browser dialogue, click the connect to folder

button, which accesses the computers hard drives and filefolders

c. Navigate to D:\CEE273\Trabuco\Trabuco_08\GIS_Data\shapes\and click the OKbutton

d. The next dialogue shows that we have three vector layer. From the

layer symbol we can identify that two of them are line features andthe third has polygon features.

e. With the Shift key pushed down, click once on each of the layers to

highlight them all, and then push the ADD button. Before the datais loaded into ArcMap, you may receive a warning about unknownspatial references, for now IGNORE it and push the OK Key:

f. Repeat steps a and b and go to directoryD:\CEE273\Trabuco\Trabuco_08\GIS_Data\grids\

g. Select the dem_30m grid and push the OK button. Now you have 3vector layers and 1 grid layer loaded into the map display

Ascii format of grids

Grid directoryShapes (vector data directory)Additional tabular data

ArcMap: Adding layer and layer navigation


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Creating Hill Shade from DEMStep 1. Display Background DEM

Uncheck the trab_buffer layer to allow the display of the dem_30m raster

layer. DEM (Digital Elevation Map)

Step 2 Show the Spatial Analyst Tool-bar

Since DEM (Digital Elevation Map) is a raster data, we needfunctionalities from the Spatial Analyst. To get some of these functions,with the right mouse button, click anywhere on the tool bar menu andmake sure that the menu is activated

Step 3: Creating hillshade

a. Select Submenu

b. The hill-shadingdialogue appears,accept most

options, but clickon the folderbutton to save theoutput gridinstead of keepingit as temporary

ArcMap: Creating Hill Shade


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Step 3: Creating hillshade (continued)

c. Once the folder button is clicked a save-as dialogue

appears, from the pull-down menu, navigate to the

D:\CEE273\Trabuco\Trabuco_08\GIS_Data\grids\

directory. Notice that since few steps back we found thelayers in this directory (see adding a new layer), they noware members of the catalogue, and we do not have to

search for the directory again.

d. Name the new grid hshd_30m as seen below and pushthe Save button, and then clickOKin the HillshadeDialogue

Step 4: Coloring hillshaded dem

a. Now, in the table of content, drag the dem_30m to

before the hsd_30m this will place the display of thedem_30m above that of the hshd_30m

b. Right click the dem_30m grid and select

c. In the layer properties control, click on the [Symbology]tab and select appropriate color scale.

d. In the display tab set transparency to 50%

e. ClickApplyand then OKbuttons

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ArcMap: Creating Hill Shade, continued


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Save Your FileClick on the save map document button

NOTES:In the dialogue control, navigate to a writabledirectory, remember you are not saving theactual data layers, What you are saving is a fileconnecting the layers, map lay out and theselected toolbars you have decided to add toyour mapping application.

Copying the mxd file to a jump drive will notcopy the data files in the map . You have touse specific export procedures or create a fulldata base that can be copied.

In my case, I saved the ArcGIs Map file (mxd)

in d:\CEE273\maps\hillshd_trab.mxd

ArcMap: Creating Hill Shade, results


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On Your Own in the Lab: Suggestionsa. Further explore the layer properties control panel and its various tabs

b. Try changing the symbol color for roads to black and for drainage to bluec. Use the standard tool-bar buttons ti navigate around the map, zoom in, out, pan and zoom to layer.d. Use the spatial analyst to create a slope grid from the DEM. (From the surface analysis sub-menu in

the Spatial analyst tool bar)

e. What do you see in the slope map that you can not see in the elevation

Slope map for Trabuco

Canyon

ArcMap: Suggested Practice (Spatial Analyst)

01 arcgis arcmap intro

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