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pdfAttachment B
Instructions for Using the Web Viewer Tool
for the VTD/BBSP Verification
Version 1
January 2010
Table Of Contents
I.
INTRODUCTION.................................................................................. 3
II. ACCESS, LOGIN, AND SELECT COUNTY TO VERIFY ............. 3
A.
B.
C.
Accessing the Web Viewer Tool. ..................................................................... 3
Program Login .................................................................................................. 4
Selecting the County (or County Equivalent) to Verify ................................... 5
III. TOOLS .................................................................................................... 6
A.
B.
Tool Symbols and Definitions. ........................................................................ 7
Specific Information for Selected Tools. ......................................................... 8
1.
2.
3.
4.
5.
Previous Map Extent...................................................................................... 8
Get Information.............................................................................................. 8
Measure Distance......................................................................................... 11
Print a Map................................................................................................... 13
Email a Map ................................................................................................ 14
IV. LINKS ................................................................................................... 15
A.
B.
Legend............................................................................................................ 16
Layers............................................................................................................. 17
1. Views ............................................................................................................ 18
2. Suffix............................................................................................................. 19
C. Dataview ......................................................................................................... 21
D. Selection.......................................................................................................... 25
E. Changes ........................................................................................................... 26
Instructions for Using the Web Viewer Tool for the VTD/BBSP Verification
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I.
INTRODUCTION
During the verification phase of the Voting District/Block Boundary Suggestion Project
(VTD/BBSP) participants may verify their data using the Web Viewer tool. The Web
Viewer tool allows participating states to review the VTD/BBSP submission in a Webbased environment without the need of installing additional software. Participants may
access the Web Viewer using a Web browser.
The Web Viewer tool does not support an edit function. Any corrections to the Census
Bureau’s data required as a result of the verification review must be conducted using the
MAF/TIGER Partnership Software (MTPS). See Attachment C: Instructions for Using
the MTPS for Verifying the VTD/BBSP Submission for detailed instructions.
Note that minor or small corrections resulting from the verification of the VTD/BBSP
submission using the Web Viewer tool can be discussed with the respective Regional
Census Center (RCC) to enter the correction. (See Attachment A: RCC Geographic Staff
Contact Information for contact information.) An example of a correction that can be
communicated for the RCC staff to fix is changing the VTD cover for a small face or
two. Minor or small corrections can be conveyed to the RCC staff to preclude submitting
a RDP “change” file using the MTPS.
II. ACCESS, LOGIN, AND SELECT COUNTY TO VERIFY
Follow these guidelines for accessing the tool and entering the correct login information.
A. Accessing the Web Viewer Tool
In order to access the Web Viewer tool, go to: http://ecots1.geo.census.gov/mtpsmaps/
The following screen appears.
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Note: See the above screen for the location of the Help module included in the Web
Viewer tool. Select Help for basic user guidance on the interface commands and
views which are consistent with these guidelines.
B.
Program Login
Login in as “RDP Program Participant”
See the letter that was sent with the verification materials from the Redistricting Data
Office (RDO). The letter provides the following information:
Participant ID
User Name
Password
Instructions for Using the Web Viewer Tool for the VTD/BBSP Verification
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C. Selecting the County (or County Equivalent) to Verify
After logging in as the RDP Program Participant (example for New Hampshire, ST:33),
the Web Viewer returns a menu listing all counties in the selected state.
Select
to identify which county (or county equivalent) will be reviewed. For
example, select Belknap County, NH to begin the verification. The Web Viewer displays
the selected county.
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To select a different county, select List Counties (top/left) to return to that screen.
III. TOOLS
Use the Web Viewer toolbox for navigation, information and measurement as shown
(outlined in red) in the graphic above.
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A. Tool Symbols and Definitions
Zoom to whole county
Click this icon to zoom out to the entire
county
Choose a previous zoom to
display
Use this tool to choose one of the last 5
map displays and zoom to it
Zoom in
Click or draw a rectangle to zoom into an
area
Zoom out
Click to zoom out of an area
Drag
Click and drag the map to re-adjust the
center
Get info
Click a feature to get information on it
Note: Use this tool with selection link
Measure a distance
Use this tool to draw a line between
features and click to display the distance.
Draw a polygon to display area.
Print map
Print the current map view
Email map
Email the current map view
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B.
1.
Specific Information for Selected Tools
Click this tool to choose a previous map extent.
This tool displays your last (up to 5) map extents.
Click on the previous map extent to display.
2.
Click this tool to Get Info.
To use the information tool, click the
Info button. After clicking this button, the
view will switch to the Selection link. (See the graphic on the following page.)
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Once the Selection link is active, select the Map Layer for the Info that you want to
review.
Note: In order for a Map Layer to display with the selection link active, the layer must
be turned on in the Layers link. For example, in order to select a lake, the River,
Lake, or Ocean layer must be turned on. To turn on a layer (and make it
available to get information), click the Layers link and then click Show Layer
and Show Labels for that layer. (See the graphic on the following page.) Click
“Redraw Map” then select the appropriate Map Layer from the pull down menu
above.
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Instructions for Using the Web Viewer Tool for the VTD/BBSP Verification
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After choosing the appropriate map layer, select the feature by clicking on the feature on
the map to get information. In this example, Winnisquam Lk (lake) was selected and is
now displayed in the FULLNAME field along with other information for that feature.
3.
Click this tool to measure distance of a line or area.
In order to measure distance, draw a line between two features. To draw a line click on
the starting point of the line and then click on the end point. It is not necessary to double
click. The distance can only be shown in miles (Mi) and kilometers (Ki) and displays in
the upper right corner of the screen (displayed in the graphic below).
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Double-click to disengage a line measurement and measure any new line.
To measure an area (such as Bond Park in the following example), trace a polygon by
clicking on each turn (point). Double click to close the polygon. The area displays in the
right corner (displayed in the second graphic below).
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4.
Click this tool to print a map.
To print a map, pan or zoom to the desired screen view. The print button prints the
current screen view.
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Note: A table for the Active Layer (VTDs) is also included.
Note: Tip for printing maps
The Map layer legend automatically appears on the printed map. However, the
legend only shows the features that are turned on in the Layers view.
In order to display the desired layers, turn on layers in the Layers view before
selecting a map view to print.
5.
Click this tool to email a map.
The Email button captures the current map view just like the print button. It is therefore
important for users to turn on or off the layers to display on the map. When the user
clicks the Email button, the following screen prompts the user for email information. It
is not possible to email more than one map at a time.
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Be certain to provide relevant information in the comment text box. Communicate the
specific reason for sending the map.
IV. LINKS
The Links settings are located on the top right-hand corner of the Web Viewer as
displayed in the graphic below.
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A. Legend
Click the Legend link to display the symbols for the map’s layers and a graphic scale of
the map.
Note: The Legend only contains features that are visible at the current scale. Some
features are scale dependent and therefore will not display until the user zooms in
further. See the Layers link for more information on the scale at which they can
be viewed. See the VTD layer example for the viewable scale under Layers
Link section below.
In the following map display, the Legend lists the Map layers relevant for the RDP
verification.
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Set these Map layers in the Layers link.
B. Layers
Use the Layers link to control the features to display and label. Turn layers on and off
by checking and un-checking layer boxes.
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1. Views
Use the Views menu at the bottom of the screen to display specific views.
Select Views for pre-set layer settings. See the following layer sets when selecting these
Views:
VTD Changes:
Show Layer & Show Labels checked for
VTD and VTD-P layers.
Show All:
Show Layer & Show Labels checked for All
layers.
Hide All:
Show Layer & Show Labels not checked
for All layers.
Highlight Changes:
Show Layer & Show Labels checked for
All Lines & VTD-P layers.
Incorporated Places:
Show Layer & Show Labels checked for
All Lines, MCD, & Incorporated Place layers.
American Indian Areas view: N/A (Show Layer & Show Labels checked
for All Lines.)
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2. Suffix
Some names listed in the “Layer Name” column contain a suffix. They indicate:
P=Participant Change: This layer represents Participant submitted changes and
shades all area where the participant entered VTD changes in the delineation
phase.
See the following display for VTD-P changes.
Note that all VTDs with the exception of VTD 4:LACONIA WARD 2 (B) had
changes in the delineation (annotation) phase.
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Note:
No VTDs display as changes if the participant did not use the MTPS for
delineation.
C and F suffixes: These two suffixes were part of the original design for this
module and are not currently functional.
Unsuffixed VTD layer represents VTDs as they currently exist in the MTDB.
Note: Each layer has a scale dependency and cannot be viewed at scales smaller than the
ratio scale listed next to the layer. The user cannot adjust the scale at which the
layer can be viewed. Depending upon the current scale and layer, it may be
necessary to zoom in further to view them. See the RDP layer viewable scale
ratios below.
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Redraw Map when turning a layer on or off.
Upload Layer: Select this to add a “local” shapefile to this map. The following text box
appears.
Browse to the local folder of the shapefile to upload.
Enter a Name for the shapefile layer to upload to the map.
Select Upload.
Note: The file must include three files: .SHP, .SHX and .DBF) to be uploaded and added.
C. Dataview
Use the Dataview link for zooming into a specific layer or viewing a complete list of a
certain feature or entity type.
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For example, select VTD from the Dataview Layer in order to see a list of all VTDs in
the county.
Click the Zoom icon to zoom in to the VTD.
The Viewer zooms to and displays the selected VTD. This is useful in reviewing the
VTD names and codes.
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If the layer has a long list of features or entities, it may be helpful to search for a specific
one. The user can enter attribute information such as a SLD Lower and NAME, for
example, and select Find.
Note: The search is case sensitive.
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Now select the Zoom icon to zoom in to the searched entity, example SLDST 104.
The Web Viewer zooms and displays the entity of the search.
Note: Once the user has used the Dataview link to select a searched entity or feature,
to get more information about the entity, as demonstrated
use the Info tool
for an SLD Lower example below.
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D. Selection
Use the Selection link to choose an “active” selection layer and then use the Info
tool to acquire more details about the entity or feature.
For example, with the Selection link engaged, select VTD as the Map Layer.
Note: Remember that the VTD layer must also be checked.
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Select the Info icon
and place the cursor in the VTD and left-click. The VTD
shades and information for that VTD is displayed.
E. Changes
Select the Changes link to view changes by layer. For example, to identify submitted
VTDs that have changed boundaries and/or attribute values (Code, Name, LSAD, VTDI)
from Census 2000, select the Changes link and select the respective layer from the List
Changes for Layer menu.
Note: No VTDs display as changes if the participant did not use the MTPS for
delineation.
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The Web Viewer returns a menu with the “changed” VTDs that can be selected and
zoomed to.
Note: See the following table for the description of the change types (chng_type) for
Area and Line Layers.
Refer to the Help module or contact the RCC for questions on the Web Viewer interface.
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| File Type | application/pdf |
| Author | Bureau Of The Census |
| File Modified | 2010-01-15 |
| File Created | 2010-01-15 |