ArcGIS REST Services Directory Login
JSON | SOAP

dep/Eelgrass (MapServer)

View In:   ArcGIS JavaScript   ArcGIS Online Map Viewer   ArcGIS Earth   ArcGIS Pro

Service Description: <div style='text-align:Left;font-size:12pt'><div><div><p><span style='font-size:16pt'><span>Maine's seagrass meadows, particularly eelgrass, form an important marine and estuarine coastal aquatic habitat for the state. Along with other plants, eelgrass forms the base of food production in the sea. Eelgrass provides shelter for juvenile fish, and invertebrates, is a site for primary settlement of the larvae of some bivalve mollusks, and in certain locations helps to stabilize unconsolidated sediments and shorelines. Aerial imagery was acquired during the peak aboveground biomass growing season, typically June to August. Photography was timed near low tides with low wind velocity, and good water clarity. These factors aid in the detection of the subtidal portion a bed. Polygons delineating stands of seagrass were screen digitized and coded using a four category scale of percent cover. Cover Class values: 1 = 0% to 10% cover, 2 = 10% to 40% cover, 3 = 40% to 70% cover, 4 = 70% to 100% cover. Verification was carried out by boat, on foot, and by plane. Though dense patches of seagrass approximately 6 meters in diameter and less can be identified under good conditions and in some cases were mapped, a conservative estimate of the minimum mapping unit is 100-150 square meters depending on the year. </span></span></p></div></div></div>

Map Name: Eelgrass Beds

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description: Maine's seagrass meadows, particularly eelgrass, form an important marine and estuarine coastal aquatic habitat for the state. Along with other plants, eelgrass forms the base of food production in the sea. Eelgrass provides shelter for juvenile fish, and invertebrates, is a site for primary settlement of the larvae of some bivalve mollusks, and in certain locations helps to stabilize unconsolidated sediments and shorelines. Aerial imagery was acquired during the peak aboveground biomass growing season, typically June to August. Photography was timed near low tides with low wind velocity, and good water clarity. These factors aid in the detection of the subtidal portion a bed. Polygons delineating stands of seagrass were screen digitized and coded using a four category scale of percent cover. Cover Class values: 1 = 0% to 10% cover, 2 = 10% to 40% cover, 3 = 40% to 70% cover, 4 = 70% to 100% cover. Verification was carried out by boat, on foot, and by plane. Though dense patches of seagrass approximately 6 meters in diameter and less can be identified under good conditions and in some cases were mapped, a conservative estimate of the minimum mapping unit is 100-150 square meters depending on the year.

Service Item Id: dfcd9e1d13494b02b77b7c445bd346af

Copyright Text: Maine DEP

Spatial Reference: 26919  (26919)  LatestVCSWkid(0)


Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info: Supports Dynamic Layers: true

Resampling: false

MaxRecordCount: 10000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true



Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryLegends   QueryDomains   Find   Return Updates