Arcgis training day_2
-
Upload
yashasweesharma -
Category
Technology
-
view
2.204 -
download
3
description
Transcript of Arcgis training day_2
ADD XY DATA TOOLTakes a table containing XY data & Creates a layer from it. The table must alreadty contain two separate fields containing X & Y ( these X & Y fields must be Numeric data type ) coordinate data. The new layer will contain one point for each record in the table.
• Exercise : - Provided RO details along with the Coordinates. Plot these RO locations
Open Arcmap Go to Tools & click Add XY data tool. Add XY window appears
FILE HAVING THE COORDINATES
SELECT THE FIELDS HAVING X & Y COORDINATE
DEFINE PROJECTION OF THE COORDINATE AVAILABLE IN THE FILE
BUFFERING A distance analysis tool for points, lines, and areas Create new polygon representing specified distance Answer questions based on proximity
Buffer 50 meters Buffer by attribute values
Buffer 100 meters, do not dissolve interior borders
Go to Customize In Customize windows Commands Tab
Tools Buffer Wizard Tool is available. Drag this tool & place in your Tool Bar.
THE BUFFER WIZARD
1. Choose the features 2. Choose the distances
3. Choose the output type & output file 4. Display output layer or graphic
• Exercise : - Provided a Road & Building Layer. All the roads are going to be widened by the distance mentioned in N_WIDTH field in the Road shape file. Identify the number of Buildings affected.
SELECTION – AVAILABLE SELECTION TOOLS
Interactive, attributes, location, graphics
Selected set
SELECTION – INTERACTIVE SELECTION METHOD
Specify selection method Create New Selection Add to Current Selection Remove From
Current Selection Select from
Current Selection
SELECTION – SELECT BY LOCATION Use features in one layer to select features in another
• Exercise : - Provided various layers of Hyderbad city. Find the number of Roads • Completely Inside Kukatpally Pin code Boundary.• Completely or Partially inside Kukatpally Pin code Boundary.• Crossing Kukatpally Pin code Boundary.
EDITING OPERATIONS - FORMATS
Shapefiles
Geodatabasefeature classes
EDITING OPERATIONS – EDITOR TOOLBAR
Edit sessioncommands
Edit tool Sketch tool
Task list
Layer control
Attributedialog
All editing functions are controlled through the toolbar
EDITING OPERATIONS – MANAGING EDIT SESSION
Starting a session Only within one data frame at a time
Saving edits During the edit session At the end of the edit session
Ending a session
Delete
Cut
Copy
Paste
Undo/Redo
Moving Click and drag Delta x,y coordinates
Rotating
Others
EDITING OPERATIONS – SIMPLE EDITING OPERATIONS
A sketch lets you perform an editing task add new features modify features reshape features
Sketches work with the current task Create New Feature Reshape Feature Extend/Trim Features More
Set snapping tolerances for working with sketches
Current task
EDITING OPERATIONS – SKETCHES
Sketch context menu
Sketch tool context menu
Sketch tool Right-click while sketching
Sketch Right-click when pointer is on a
segment or vertex in a sketch
EDITING OPERATIONS – SKETCHE CONTEX MENUS
Trim allows you to change the length of a sketch
Length = 30
Length = 20
EDITING OPERATIONS – MODIFYING SKETCHE LENGTH
Finish Sketch
Finish Part For creating multipart features Shortcut: Shift + double-click
Finish Sketch
EDITING OPERATIONS – FINISHING A SKETCH
Specify a length constraint from the last vertex
Change the length of the last segment Angle is maintained
Length = 29
EDITING OPERATIONS – LENGTHS
A sketch works with the current task Create New Feature Selection tasks Extend/Trim Features Mirror Features Modify Feature Reshape Feature Cut Polygon Features Auto Complete Polygon
Current task
EDITING OPERATIONS – EDIT TASKS
Extend feature to the sketch
Trim features on the right side of the sketch
EDITING OPERATIONS – EXTEND/TRIM FEATURE TASK
Allows you to edit the vertices of an existing feature You can only modify one feature at a time Shortcut: Double-click with the Edit tool
EDITING OPERATIONS – MODIFY FEATURE TASK
Feature takes the shape of the sketch from the first intersection to the last
Cut a feature into two parts
EDITING OPERATIONS – RESHAPE & CUT FEATURE TASK
EDITING OPERATIONS – SHARED FEATURES
Select shared feature Reshape task
Modify task (double-click with shared edit)
Ensures shared edge between polygons All polygons in a polygon coverage must be created with this task
All polygons are adjacent to another polygon
EDITING OPERATIONS – AUTO COMPLETE POLYGON
Create features in the target layer Divide Buffer Copy Parallel Union Intersect
Create features in the same layer Split Merge
EDITING OPERATIONS – FEATURE CREATION TOOLS
Copies a line feature parallel to the original feature Positive is on the right side of the feature
Creates feature in target layer
EDITING OPERATIONS – COPY PARALLEL
Creates features in the target layer Does not delete original features Union
Example: Creating a sales territory
Intersect Example: Overlapping area of sales territories
EDITING OPERATIONS – UNION & INTERSECTION
Replace existing feature with new feature Merge
Line or polygon Example: Combining two parcels
Split Line By percentage or distance Example: Splitting a water main in half
EDITING OPERATIONS – SPLIT & MERGE
TOPOLOGY
Topologies maintain high-quality spatial data by ensuring that your features conform to simple rules. When you set up a geodatabase with a topology, you specify which feature classes participate in the topology and define rules that control when and how features can share geometry. For example, in a geodatabase of states and coastlines, you might have a rule stating that polygons cannot overlap each other and another rule that the coastline must coincide with the boundaries of the states. These rules would help you ensure, when updating the state boundaries to match the coastline, that you don't inadvertently create places where the states overlap or where a state's coastal edge doesn't match the shape of the coastline.
For Using this option all the layers must be in Featureclasses & should be inside a dataset.
This option is not available in ARCVIEW license.
Right click on the dataset having the layers for which the topology is to be checked.
Go to New topology option.
TOPOLOGY – DEFINE RULES
ENTER TOPOLOGY NAME & DEFINE THE TOLERENCE ( GENERALLY KEEP THE TOLERENCE AS THE DEFAULT VALUE )
SELECT THE LAYERS FOR WHICH THE TOPOLOGY IS TO BE CHECKED
ASSIGN RANKS TO THE LAYERS ( FOR OUR PURPOSE DON’T CHANGE THE RANK, KEEP THE DEFAULT VALUES )
CLICK ON THE ADD RULE BUTTON TO ADD THE TOPOLOGICAL RULES
ONCE THE ADD RULE BUTTON IS CLICKED THE WINDOW SHOWN ABOVE APPEARS & THE USER CAN DEFINE THEIR RULES ON THE LAYERS. ONCE RULES ARE DEFINED CLICK NEXT & FINISH BUTTON.
THE USER WILL RECEIVE A MESSAGE AS SHOWN ABOVE. CLICK ON YES BUTTON
TOPOLOGY – VIEWING THE TOPOLOGICAL ERRORS
ONCE THE PROCESS IS COMPLETE, A TOPOLOGY LAYER IS CREATED INSIDE THE DATASET.
ADD THIS TOPOLOGY LAYER IN ARCMAP & THE TOPOLOGICAL ERRORS WILL BE DISPLAYED
Error Summery can also be generated - Right Click on the Topology layer in
Arccatalog Go to Properties Errors
Generate Summery
GEOMETRIC NETWORK
A geometric network is a connectivity relationship between a collection of feature classes in a feature dataset. Each feature has a role in the geometric network of either an edge or a junction. Multiple feature classes may have the same role in a single geometric network.
Create in ArcCatalog Edit in ArcMap Analyze in ArcMap
Up and downstream tracing Find connected features Find the most efficient path
For Building Geometric Network the Layer must be featureclass inside a Dataset
This option is not available in ARCVIEW license.
Right click on the dataset having the layers for which GEOMETRIC Network is to be created.
Go to New Geometric Network option.
GEOMETRIC NETWORK - CREATION
The window shown above appears. Select the first option which is by default. Click Next
Select the featureclass & provide the Geometric Network Name. Click Next
Keep the default option available here
Keep the default option available here. This will not allow you to connect to a Road Edge without creating a node.
Keep the default option available here. This will retain you network feature as it is.
Select Yes if you want to define any weight or select No. If Yes is selected define the Weight Name & Type
GEOMETRIC NETWORK - CREATION
Select the fields that will contain the values of the Weight Defined Summery of the options selected is displayed, Click on
the Finish Button
After creation of Geometric Network Junction Layer is formed & a Geometric Network icon is created.
GEOMETRIC NETWORK – SIMPLE NETWORK FEATURES
Edge
Ed
geJunction
Edge
Edges have distance and direction All edges end with a junction Junctions connect edges
GEOMETRIC NETWORK – SIMPLE NETWORK TASKS
Add these layers in Arcmap Open the Utility Network Tools.
Various Network Tasks
GEOMETRIC NETWORK – FIND SHORTEST PATH
Go to Analysis Options
Select the Weight Defined on the Shape Length Field
Set The task as Find Path. Click on the Add flag & define from & to
points
Click on Solve Button & the shortest Route will be selected
GEOMETRIC NETWORK – NETWORK EDITING
Add your Network Layers in Arcmap Start Editing Add the Network Editing Tool Bar