USGS New England SPARROW Data Viewer -- Help

New England SPARROW Data Viewer

VIEWER INSTRUCTIONS

6. Identifying features using the Identify tool

When you want information about any feature displayed in the Viewer, you can use the Identify tool on the toolbar. The Identify tool allows you to see the attributes of your data. Clicking the Identify tool on a location inside the Map Display will present the attributes of the data at that location.

When identifying features with the Identify tool, the attributes are presented in a feature-by-feature, layer-by-layer manner in the Identify Results dialog box. When you click a location in a map with the Identify tool, the Identify Results dialog box displays the data for that location. The default option is to show the information of the topmost layer in the Table of Contents for the location. You can then use the Layers dropdown list at the top of the Identify Results dialog box to choose a specific layer in your map. You will need to scroll down the list to find the SPARROW results. The Identify tool will act on the layer you choose in the Layers dropdown list.

Click the Identify tool on the Toolbar.
Hold the mouse cursor over the map feature you want to identify and click. The Identify Results dialog box opens.
Select layer you wish to query from the Layers dropdown list in the Identify Results dialog box.
With the Identify Results window still open, additional features can be queried by clicking on a feature.

Definitions for fields in SPARROW results (accessible with the Identity Tool):
Field	Description
AREA_SQMI	Area of the catchment, in square miles (mi²)
DEL_FRAC	Estimated share (fraction) delivered to the mouth of the river
MEAN_NLOAD	Predicted total nitrogen flux, in kilograms per year (kg/yr)
MEAN_PLOAD	Predicted total phosphorus flux, in kilograms per year (kg/yr)
N_CONC_MGL	Predicted flow weighted nitrogen concentration, in milligrams per liter (mg/L)
N_INC_YLD	Predicted nitrogen yield generated within the catchment, in kilograms per square kilometer per year (kg/km²/yr)
N_IYLD_AGR	Nitrogen yield generated within the catchment - agricultural, in kilograms per square kilometer per year (kg/km²/yr)
N_IYLD_ATM	Nitrogen yield generated within the catchment - atmospheric, in kilograms per square kilometer per year (kg/km²/yr)
N_IYLD_DEV	Nitrogen yield generated within the catchment - developed, in kilograms per square kilometer per year (kg/km²/yr)
N_IYLD_SEW	Nitrogen yield generated within the catchment - wastewater, in kilograms per square kilometer per year (kg/km²/yr)
NAME	Stream / River Name
P_CONC_MGL	Predicted flow weighted phosphorus concentration, in milligrams per liter (mg/L)
P_INC_YLD	Predicted phosphorus yield generated within catchment, in kilograms per square kilometer per year (kg/km²/yr)
P_IYLD_AGR	Phosphorus yield generated within the catchment - agricultural, in kilograms per square kilometer per year (kg/km²/yr)
P_IYLD_DEV	Phosphorus yield generated within the catchment - developed, in kilograms per square kilometer per year (kg/km²/yr)
P_IYLD_FOR	Phosphorus yield generated within the catchment - forest, in kilograms per square kilometer per year (kg/km²/yr)
P_IYLD_SEW	Phosphorus yield generated within the catchment - wastewater, in kilograms per square kilometer per year (kg/km²/yr)
REACH_RE_1	Internal number for the feature, in kilograms per square kilometer per year (kg/km²/yr)
SOURCE_INC	Primary source of nitrogen or phosphorus load generated within the catchment
SOURCE_TOT	Primary sources of nitrogen or phosphorus load from the total watershed area
SPARROW_ID	New England SPARROW reach identification number

Definition of fields used in SPARROW NHD Streams can be determined by referring to the metadata at http://nh.water.usgs.gov/projects/sparrow/data/reaches_(nenhd)_metadata.htm

U.S. Department of the Interior, U.S. Geological Survey
URL: http://nh.water.usgs.gov/projects/sparrow/help6.htm
Page Contact Information: webmaster-nh@usgs.gov
Page Last Modified: January 24, 2007