Layers and the Table of Contents

Layer List

The Layer List is in the Layers panel on left side of the viewer. To open the Layers panel either click on the Layers tab in the lower left corner of the viewer OR click on the Layer List button on the Map tab at the top.

Layers are listed in Groups. Click on the plus to expand a group. The group needs to be checked in order for layers inside it to be visible .

In this example, the Open Space Group is checked on as well as the Protected Open Space Mapping layer inside the group. The other layers are not visible.

Expand as many groups as you like and turn on (check) any combination of layers. Remember that layers draw in order. Layers higher up on the list will draw above and on top of layers below. Layers often overlap so may cover each other up. If this is the case, use transparency or turn the layer off.

Layer Actions

Many layers have a chevron to the right of the layer name in the Table of Contents which opens the Layer Actions menu/panel. The panel contains options like Zoom to full extent (of layer), Zoom to visible scale (of layer), links to a Data Guide, Resource Guide, Metadata or other related information. At this time, raster layers like elevation and imagery do not have the layer actions option. To close the panel, click on the  in the upper right corner.

Transparency

Transparency makes a layer partially or fully see-through. Transparency can be adjusted on some layers by moving the transparency slider next to the layer's name.

Layer Information

It is important to be familiar with the layers before you use them for a particular application. Layer information is available for many layers through the Layer Actions panel in the form of guides and metadata. There are other informational pages in the CT ECO website that are relevant to certain layers, listed below.

• Data and Resource Guides
• Links to metadata via the map services page
• Featured section on elevation layers
• Featured section on 2016 imagery
• Featured section on 2012 imagery
• Featured section the impervious cover layer
• National Wetlands Inventory (NWI) layers Explained
• Watersheds Explained

Legend

From the Layers panel, click on the Panel Actions icon  at the top right of the panel. Click on Show Legend to open the Legend panel. The panel contains the legend for all layers that are turned on (checked) in the table of contents. To CLOSE the Legend, click on the  at the top of the Legend panel to return to the Layers panel.

Symbology, or the symbols used for a layer (which are also shown in the legend), can also be viewed in the Table of Contents. Click on the Legend info icon to the left of the layer name to show the legend. In the case where only one symbol is used in a layer, that symbol is visible instead of the legend information icon.

Tools

Map Tab

Home

Home returns to the initial home panel which includes basic instructions and a few links.

Full Extent

Full Extent returns the map extent to the full view which is Connecticut and beyond.

Initial View

Initial View returns the map extent to the initial extent when the viewer first opened.

Previous Extent, Next Extent

If you have zoomed at least once since the viewer was opened, the Previous Extent button will take you back to the previous zoom area. The Previous Extent button can be used multiple times. After using the Previous Extent button to go back, the Next Extent takes you incrementally forward through already viewed extents.

Pan

The Pan tool cancels any active tools and sets the cursor to pan around the map.

Bookmarks

Use the Bookmarks button to save specific extents during your session. Bookmarks make it easy to jump around the map to areas of interest. First, zoom to an area of interest then click the bookmarks button. Choose Bookmark Current Extent and give the bookmark a name. The named bookmark will remain in the list even while you move around and work with the map.

Layer List

The Layer List icon opens the Layer List panel.

Find Data Tab

Identify

Use the Identify Tool to learn about what exists at a certain location. To start, click on the Point option and then click on the map. Note that Identify will only return information about features that exist in layers that are currently turned on or visible (visit the Layer List to change this). Two things happen when you click on a location. First, any features at that location are returned on the Identify Results panel which opens. Second, a red placemark is placed in the center of each feature that is listed in the Identify Results panel. Click on any feature on the Identify Results panel to see the attributes for that feature. The feature is highlighted on the map and the map extent changes to fit the extent of that feature. Click the  to close the attribute panel and return to the Identify panel.

Besides a point, the other identify options include freehand, line, polygon and rectangle as ways to choose what area will be used when identifying features. For example, draw a polygon around an area of interest to find all features that exist inside it.

Some useful options exist in the Panel Actions  menu. These include

• Switch to Table -to view the results in table format
• Show Buffer Options - to identify features near the results
• Export - results can be export as CSV, XLSX or shapefile
• Combine Results - perform operations with multiple lists of results

Query

The Query button opens the Query panel to guide the query building.

1. Choose the Data Source (layer) to query. The list is all layers that are available in the viewer.
2. Once a Data Source is chosen, all available attributes are listed in the Select filter dropdown list. Choose one.
3. Once an attribute is chosen, operators are listed in the Select operator dropdown based on if its a numeric or text field. Choose one.
4. Finally, any values associated with that attribute are listed. Choose one.

The choices together create the query. Click search to find all instances that meet the query. Each is listed with a pinpoint. Alternatively, view the results in a table by clicking on the Panel actions  icon and choosing Switch to Table. The table is a good way to click on the results and view them on the map. To switch back to the list view, locate the Panel actions icon again and choose Switch to List.

The menu also contains Buffer options and Export to csv, xlsx and shapefile.

Multiple Queries - the Add Another Condition option allows for multiple queries to be constructed together.

Edit Query - at any time, click on any of your query choices including the filter, operator or value (shown in blue) to make a change.

Remove Query - click on the  to delete a query.

Filter

Filters allow you be selective about what shows on the map based on a defined set of criteria. For example, you may only be interested in the State Forest areas that are part of the DEEP Property layer.

1. Create the Filter by first choosing the Data Source or layer.
2. Once a Data Source is chosen, all available attributes are listed in the Select filter dropdown list. Choose one.
3. Once an attribute is chosen, operators are listed in the Select operator dropdown based on if its a numeric or text field. Choose one.
4. Finally, any values associated with that attribute are listed. Choose one.

The choices together create the filter. Click Filter. If you are viewing the layer, you will notice that only the features meeting the filter criteria draw. If you are not viewing the layer, nothing happens! But when you turn on the layer, you will notice that the filter is being used.

The menu also contains Buffer options and Export to csv, xlsx and shapefile.

Multiple Filters - the Add Another Condition option allows for multiple filters (on the same layer) to be constructed together.

Edit Filter - at any time, click on any of your filter choices including the filter, operator or value (shown in blue) to make a change.

Remove Filter - click on the  to delete a query.

Draw

Drawing

The drawing tools can be found on the Draw tab. The point is visible by default. Click on the black down arrow to view the other drawing options including text , lines  and shapes . With the tool activated, draw on the map. Double-click to finish the shape. Note that instructions are provided at the bottom of the viewer.

Snapping

Some tools allow snapping (check to Enable Snapping) so that any feature you "draw" may snap to existing features in any layer(s) you select in the Select Snapping Layers tool.

Styles

The Styles button provides some options for changing the appearance of the drawn features.

Edit, Erase, Clear

Drawings can be edited or change. First, click on the Edit button, then click on the feature to edit. Follow instructions along the bottom of the viewer to change the feature. When the Erase button is activated, clicking on a drawn feature will erase it. Clear removes all drawings.

Export Drawings

To export and download the drawings in shapefile format.

Stop Drawing

Click on the drawing tool (point, polygon, etc.) again to unselect it and turn off drawing. The drawings will remain in your map until you exit the viewer OR either use the Edit options to Erase or Clear them.

Measure

Select the Distance tool to measure linear distance and the Area tool to measure area. The Area tool can be found under the small black arrow next to the Distance tool. After one of the tools is selected, change the units if desired. Also Enable Snapping  if desired. Then click on the map to create a line (distance) or shape (area) and double-click to finish. For distance, the total and length of each segment in the unit selected is visible. For area, the length of each segment as well as the total area and perimeter are returned in the units selected.

Note that instructions are provided at the bottom of the viewer.

To stop measuring, click the Measure tool again so that it is no longer selected on the toolbar. Any measurements on the map will be removed.

Coordinates and Scale

Plot Coordinates

The Plot Coordinates tool is under the Coordinates tab. After selecting the tool, the first step is to choose the coordinate system for the coordinates that will be returned. WKID stands for Well Known ID and is numeric way of cataloging coordinate systems. 4326 is a geographic coordinate system expressed in Lat/Long. The default 102100 listed is the native coordinate system of the map viewer. Other options include Connecticut State Plane NAD83 feet.

Add Points

Click on the map to place a point and display the coordinates. Click again to add another point. Notice that points are numbered on the map as well as on the Plot Coordinates panel. Alternatively, type in known x, y coordinates and click Add. Be sure the correct coordinate system is selected that matches your coordinates. If yours is not on the list, contact us (info below in the footer).

Edit Points

Click on the 3 dots next to the point to be edited. The Coordinate Actions panel has several options including Hide Coordinate, Edit and Delete. Choose Edit, make any changes and Update.

Stop Plotting Coordinates

To stop adding points, click the Plot Coordinates button again so that it is no longer highlighted. The points remain until you exit the viewer OR choose to Hide or Delete all coordinates from the Plot Coordinates panel action menu .

Coordinates Widget (lower left)

The left side of the footer ribbon holds the coordinates widget, the scale input box, and the scale bar.

Click on the Coordinates Widget button to expand the Coordinates widget. Notice that clicking on the black triangle  gives coordinate system choices. When you move the mouse over the map, the coordinates change. The Coordinate System page discusses the different coordinate systems in more detail, and the shortcuts section pertains to this viewer.

Click on the Scale Input Box  icon to expand the tool. Choose a per-existing scale. The scales are set following the Google/Bing tiling scheme.

Coordinates from the Map

Right-click on any location on the map to see the latitude and longitude for that location.

Feature Pop-up Information

Click on the map and a pop-up opens containing information for any layer that is turned on AND has a feature in that location. If more than one layer has a feature at that spot, use the drop-down menu or arrows  to flip through the features.

View Additional Details opens a new panel containing all attributes associated with that feature. It also zooms to the feature. Close the panel with the in the upper right. To go back to the view before you clicked View Additional Details, use the Previous Extent  button on the Map tab.

For in depth identifying of overlapping features, try the Identify tool.

Search

Use the Search Tool (upper right) to find a location, place, address and more. Type into the Search window and press Enter. Search Results will appear in the side panel. Click on the result you wish to navigate to. The map will redraw with the feature centered on the map. Click the in the  to remove the search results, or click on the Layers tab at the bottom of the side panel to view the Layers List.