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Tags
quadrangles, Maine, United States, index, location, human dimensions
INDEX250 was created to show 1:250,000 scale neatlines for USGS 1x2 degree quadrangles.
INDEX250 contains 1:250,000 scale neatlines for USGS 1 by 2 degree quadrangle maps covering Maine. INDEX250 is the coverage 250KINDEX renamed and projected to NAD83.
Credit should always be given to the data source and/or originator when the data is transferred or printed.
Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002 and coordinated by MEGIS
Extent
There is no extent for this item.
| Maximum (zoomed in) | 1:50,000 |
| Minimum (zoomed out) | 1:500,000 |
Monday through Friday
Credit should always be given to the data source and/or originator when the data is transferred or printed.
publication date
Monday through Friday
Users must assume responsibility to determine the usability of this data for their purposes.
Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002 and coordinated by MEGIS
publication date
Monday through Friday
polygon feature class
Environmental Systems Research Institute, Inc. (ESRI)
USGS 1:250000 scale quadrangle name
USGS 1 x 2 degree map series
USGS 1:250000 quadrangle name
Monday through Friday
INDEX250 contains 1:250,000 scale neatlines for USGS 1 by 2 degree quadrangle maps covering Maine. INDEX250 is the coverage 250KINDEX renamed and projected to NAD83.
INDEX250 was created to show 1:250,000 scale neatlines for USGS 1x2 degree quadrangles.
publication date
none
Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002 and coordinated by MEGIS
Credit should always be given to the data source and/or originator when the data is transferred or printed.
The item NAME carries the USGS official name for each 1:250000 scale quadrangle.
Data meets "Data Standards for Maine Geographic Information Systems, March 1990". Spatial topology is clean and free of errors. The coverage has been CLEANED and BUILT with polygon topology.
Data set is complete. The coverage was GENERATED from a digital file and projected to NAD83.
Approximate horizontal accuracy is 127 meters, assuming source data meets National Map Accuracy Standards.
Data was derived from digital data that meets or exceeds National Map Accuracy Standards for 1:250,000 scale.
Not applicable
INDEX250 is 250kindex renamed and projected to NAD83. The index was originally generated by Maine Office of GIS staff using the known coordinates for the corners of the USGS 1:250000 scale quadrangles.
INDEX250 is the 250kindex renamed and projected to NAD83. The index was originally GENERATED by Maine Office of GIS staff using the known coordinates for the corners of the USGS 1x2 degree map series. The item NAME carries the USGS official name for each quadrangle.
The Maine Office of GIS completed the conversion of all final data layers from NAD27 to NAD83 in July 1999. All the data layers were converted using the ArcInfo (version 7.2.1) NADCON conversion and the "project" command. All data was copied to double precision, projected to NAD83, and then copied back to single precision. It was decided to keep the NAD27 quad structure instead of generating new quad boundaries from NAD83 coordinates - all indexes (quads) were projected to NAD83 by using the same process previously described. All MEGIS data libraries in ArcInfo Librarian were repopulated using the NAD83 indexes and data.
The item NAME carries the USGS official name for each 1:250000 scale quadrangle.
The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.
Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog - http://megis.maine.gov/catalog/
Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/
If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) - www.esri.com
See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
Users must assume responsibility to determine the usability of this data for their purposes.
Please contact the Maine Office of GIS (MEGIS) for access instructions.