Frequently Asked Questions

Map Services

What is the difference between a map service and an image service?

What are the ArcGIS Server URLs used to connect to the CT ECO map and image services?

What type of orthophotography is available for Connecticut from CT ECO?

 

Connect

How do I connect to the CT ECO map or image services in ArcMap?

How do I connect to the CT ECO map and image services in ArcGIS Online?

How do I connect to the CT ECO map and image services in ArcPro?

How do I connect to the CT ECO map and image services in Google Earth?

How do I connecting using WMS?

 

Image Services

What is a tiled or cached service? Advantages and disadvantages over a dynamic service?

If an image service has tiles, how can I use it as a dynamic image service in ArcMap?

What can I do with an image service in ArcMap? ArcPro? ArcGIS Online?


What is the difference between a map service and an image service?

A map service is the way that ArcGIS server makes maps available through the web to be used in many types of applications.

An image service is the way that ArcGIS server makes pixel-based imagery available through the web for use in many types of applications. Image services support on-the-fly processing such as symbology and raster functions. Learn more here.

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What is a tiled map or image service? Advantages and disadvantages over a dynamic service?

A tiled or cached map or image service is a when a dynamic service has a pre-created cache which consists of many, many pre-made "pictures" of the service. The result is faster access for users as no processing is being performed on the server.

The opposite is dynamic map and image services have built-in capabilities where the user can change some of the layers behavior and appearance. For map services, symbology and other features are available. For image services, the user can change display, bands, stretches and more.

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What are the ArcGIS Server URLs used to connect to the CT ECO map and image services?

There are two ArcGIS Server URLs to use, depending on the type of data you need to connect to.

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Are the CT ECO map services available in Web Map Service (WMS) format for use with GIS software other than ArcMap?

Yes. Many GIS softwares can connect to the WMS version of the CT ECO map and image services. There are two ways to find the WMS address. The easiest way is to use the REST endpoints. Follow these instructions. The other way is to build the URL. Read how here.

1. Visit the ArcGIS Server REST endpoint page (here for vector services REST, here for image services REST)

2. Navigate the folders and locate the desired service

3. Find the WMS link in the upper left-hand corner

4. The WMS link opens an xml file that contains the full link to the WMS service. Copy the link and use it in the GIS software.

Some services also list WMTS which is a Web Map Tile Service. It behaves similar to WMS but accommodates tiled services.

 

WMS URL

The other way to find the WMS link is to build it. WMS links are constructed as

https://cteco.uconn.edu/ctmaps/services/FOLDER/SERIVCE/MapServer/WmsServer?
where FOLDER is the containing folder(s) such as Base_map and SERVICE is the same of the map service such as CT_Base_Map. For example:

https://cteco.uconn.edu/ctmaps/services/Base_Map/CT_Base_Map/MapServer/WmsServer?

https://cteco.uconn.edu/ctraster/services/FOLDER/SERVICE/ImageServer/WMSServer?
where FOLDER is images and SERVICE is the name of the image service, such as NAIP_2008. For example:

https://cteco.uconn.edu/ctraster/services/images/NAIP_2008/ImageServer/WMSServer

Visit the map and image services page for a complete list of available services.

WMS Link Examples:

MapsWMS Map Service URL
Base Map/CT Base Map

https://cteco.uconn.edu/ctmaps/services/Base_Map/CT_Base_Map/MapServer/WmsServer?
WMTS: https://cteco.uconn.edu/ctmaps/rest/services/Base_Map/CT_Base_Map/MapServer/WMTS?

Bioscience/Natural Diversity
Database Areas
https://cteco.uconn.edu/ctmaps/services/Bioscience/Natural_Diversity_Database_Areas/MapServer/WmsServer?
Geology/Surficial Materials https://cteco.uconn.edu/ctmaps/services/Geology/Surficial_Materials/MapServer/WmsServer?
Open Space/Protected Open
Space Mapping
https://cteco.uconn.edu/ctmaps/services/Open_Space/Protected_Open_Space_Mapping/MapServer/WmsServer?
Soils/Inland Wetland Soils https://cteco.uconn.edu/ctmaps/services/Soils/Inland_Wetland_Soils/MapServer/WmsServer?
Watersheds/Basins https://cteco.uconn.edu/ctmaps/services/Watersheds/Basins/MapServer/WmsServer?
ImagesWMS Map Service URL
Ortho 1990https://cteco.uconn.edu/ctraster/services/images/Ortho_1990/ImageServer/WMSServer
Ortho 2004 https://cteco.uconn.edu/ctraster/services/images/Ortho_2004/ImageServer/WMSServer
Ortho 2009 CRCOG https://cteco.uconn.edu/ctraster/services/images/Ortho_2009_CRCOG/ImageServer/WMSServer
Ortho 2010 Coast https://cteco.uconn.edu/ctraster/services/images/Ortho_2010_Coast/ImageServer/WMSServer
Ortho 2012 WMS: https://cteco.uconn.edu/ctraster/services/images/Ortho_2012/ImageServer/WMSServer
WMTS: https://cteco.uconn.edu/ctraster/rest/services/images/Ortho_2012/ImageServer/WMTS?
NAIP 2016 https://cteco.uconn.edu/ctraster/services/images/NAIP_2016/ImageServer/WMSServer
Ortho 2016https://cteco.uconn.edu/ctraster/services/images/Ortho_2016/ImageServer/WMSServer

 

Go to the CT ECO Map and Image Services page for CT ECO Data Guides and/or GIS metadata for each CT ECO service.

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What type of orthophotography is available for Connecticut from CT ECO?

More than 15 datasets of orthophotography are available on CT ECO. There are many variables that make each dataset unique including:

  • year captured
  • different seasons (spring or summer)
  • different bands (black and white, true color, false color) and
  • different pixel resolutions (such as 1 meter, 1 foot and 0.25 foot)

Photography taken during the summer is generally referred to as "leaf on" orthophotography, and photography taken during the early spring is generally referred to as "leaf off" photography. Leaf off is captured immediately after the snow cover melts and before stream levels rise and leaves blossom on the trees. It is ideal for observing features on the ground surface in developed, open or wooded areas. The leaves on trees and shrubs that would normally obstruct the view from above during the summer are largely absent in the early spring, allowing for the observation of features such as stone walls, roads, and structures in wooded areas, lawns and yards.

Refer to Connecticut Digital Orthophotography for a list and brief description of orthophotography available from CT ECO.

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