What's New In Search (*** Please review. Updated 4/2/2024 ***)

• NEW!!! We have upgraded all shapefile exports so that they either render in an acceptable time (under 3 minutes) or you will get a message explaining what has happened. We are working on speeding up rendering of large shapefiles. Please note that you can download a detailed (Excel/CSV) file for any NAACC (after 6/1/2015) search result and open it in GIS software using the GIS_Longitude and GIS_Latitude column for the x and y coordinates (projection WGS84, EPSG:4326). Please note that unassessed crossings will not be in the detailed Excel report. If you need all unassessed crossings, please email contact@naacc.org.
  
  Thanks to the hard work of NAACC members, we now have nearly 78,000 records in the NAACC (after 6/1/2015) dataset. Due to the large number of records, it now takes about 2 minutes to display all records on the search page. Please be patient when searching for a very large number of records. The good news is that we have revised the Excel reports such that the entire NAACC (after 6/1/2015) can be downloaded in CSV format in under 40 seconds. We will soon upgrade Excel Reports of the remaining datasets to the new system.
  
  

SCE Help

1. If you want to use the SCE to analyze your search results, you should check the checkbox at the top of the search form before choosing your search parameters. If you check the SCE box on the search form, the "Choose Data Sets" dialog (and some other search parameters) will be hidden because the datasets for anlysis in the SCE are chosen by default.
2. After you click "Search," a "Map With SCE" button will become available. Once the SCE is open, you may choose additional attributes for analysis that do not appear in the search parameters or elsewhere in the NAACC data. Detailed information about SCE attributes may be found by clicking "About SCE" from the SCE menu bar.
3. The SCE works independently, and you may use the search page to generate other search results while the SCE is open; however, if you do a new search with the SCE checkbox checked, a new SCE will open and you will lose the data you were analyzing previously.
4. There are technological limits to how many points the SCE can render at once, and the maximum geographic area that will work with the SCE is a state. The states NY, PA, VA and WV have too many crossing points for the SCE, and you must choose a smaller geographic area when working with those states.
5. Please be patient when working with other large geographic areas like ME, MA, and VT. Unsurveyed crossings and some charts may take a couple of seconds to render and thus the SCE interface may seem unresponsive. How responsive the SCE is will depend on the computer hardware you are using and how busy the server is. If you get a lot "timeout" errors in the SCE status window, please consider choosing a smaller geographic area to work with.

General Search Help

• Clicking "Search" with the default parameters will always return all records for all data sets selected.
• Set filters above to search for particular road/stream crossing records and then click 'Search'.
• If you want to keep your search filter settings when you leave the search page, use the back button to return.
• To reset your search filter settings, click the 'Search Crossings' link on any page.
• Please note that there may be more than one Survey ID for a crossing location (i.e. xy style Crossing Code) because the location may have been assessed by different teams at different times.
• For all data sets, you may enter multiple "Survey IDs" at one time separated by commas without spaces. For example - 122,20003,313,4004 or for the Connecticut(2004-2013) data set 001-001,001-002,001-003.
• You may enter multiple "Crossing Codes" separated with commas without spaces - xy4242796572955280,xy4265055771254573,xy4264844271243666
• The numbers in brackets in drop down menus represent the number of crossing locations assessed.
  (Please note that the number of records returned for a search will likely be different than the number of crossing locations assessed because there may be multiple surveys of a single location or because you do not have permission to view some records.)
• As a complement to the dialog that shows the number of "not approved" and "not data checked" records you have, we have color coded the "SurveyID" and "Crossing Code" columns in the search results (color blind friendly). Orange colored Survey IDs indicate "not data checked," and "Fuchsia" crossing codes are "not approved."
• You may select the following combinations of data sets to search:
  
  1. All Non-tidal Connectivity data sets except New Hampshire (2006-2016)
  2. "The NAACC (after 6/1/2015)" data set and the "UMass Stream Continuity Project (2005-2016)" data set
  3. Any single data set
• Tip: Although you cannot select every possible combination of data sets, you can return all the crossings from multiple data sets for a state. For example, to return all crossings from all data sets for the state of Maine, choose all 5 data sets and select the state of ME under the "Location" heading. This will return all the Maine crossings from the NAACC, and Maine (2007-2015) data sets. Since the UMass Stream Continuity Project, Vermont and Connecticut data sets do not contain Maine crossing records, they will simply be ignored. If you click "Map Results," the map will show Maine crossings from the 2 data sets containing ME records.

Map Help

• Although it is possible to map all the assessed crossings in all 5 Aquatic Passability data sets (nearly 78,000), it takes a a couple of minutes, and you may get messages saying that the page is "unresponsive" (click "wait" in this case). However, once the map renders, it is very responsive when zooming or scrolling. Nevertheless, you may find mapping subsets of all 5 data sets (by state, town, watershed or dates) to be more useful.
• If you set the 'Location:' to be a state without a town, all unassessed crossings within that state will appear along with your search results when you zoom in far enough. Since shapefiles are generated using the search results, they will also contain unassessed crossings.
• If you choose a town within a state, only the unassessed points within that town will appear along with your search results.
• Otherwise, the map will show assessed and unassessed road/stream crossings that are within the smallest bounding box that contains the assessed points returned by your search, but only if the number of unassessed points is less than 160,000 points. The assessed and unassessed points outside this bounding box will not show on the map.
• To display unassessed crossings for a town that has no ([0]) assessed crossings, select the town and click 'Search.'
• You may need to zoom in quite closely to view unassessed points.
• Unassessed points will not appear when displaying all crossing surveys for all states. Since we now cover the 13 states of the North Atlantic Region, there are over 700,000 unassessed points, and it is not possible to display them all at once.
• For a detailed explanation of the map functions and symbols, click 'Map information' in the map window.

Shapefile Help

• The projection of all exported Shapefiles is WGS84, EPSG:4326.