The attributes of this dataset allow the determination the orthophoto associated with a polygon and its parent quadrangle name.
quarterquads.mtd - this metadata in mp (metadata parser) compatible ASCII text form
quarterquads.html - this metadata in HTML form
quarterquads_faq.html - this metadata presented as Questions and Answers
quarterquads.sgml - this metadata in SGML form
quarterquads1.gif - thumbnail graphic of data set
quarterquads2.gif - larger view of data set
quarterquads3.jpg - Screen grab illustrating registration of 12K grid with a
primary datum registration tic (the solid cross, NAD83)
for an orthophoto.
If these data are altered or incorporated into another dataset, they are not to be redistributed without also: altering the name of the dataset, including a Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998) compliant metadata file that describes the dataset and reflects the alteration steps that makes the new dataset different from this one, and citing this dataset in the metadata as a source for the altered dataset using the source citation specified below.
If these digital data are used in the production of a report or in the compilation of a standalone printed map, then this dataset is to be cited in the report or on the map using the source citation specified below.
The following source citation is to be used when citing this dataset: LOSCO Environmental Baseline Inventory Dataset '12K (3.75') Grid / Orthophoto Index for Louisiana, Geographic NAD83, LOSCO (2000) [quarterquads]'
Users hereby agree to abide by the use and reproduction conditions specified above. By using the data described in these metadata, the user acknowledges that the terms and conditions of use have been read and that the user is bound by these criteria.
The seven digit USGS numeric code is derived from the latitude and longitude of the southeast corner of the one degree block of which the 7.5' quadrangle is a part and a one-of-64 identifier for each 7.5' tile within that block. The one-of-64 tile numbering scheme is for the 8 by 8 matrix of 7.5 minute tiles that compose a one degree block. The tile numbering scheme begins with 01 in the northwest corner of the block, proceeds left to right across the top row and each subsequent row, finally ending with the number 64 at the southeast corner of the block.
1 = NW 2 = NE 3 = SE 4 = SW
These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures.
Although these data have been processed successfully on computers at the LOSCO, no guarantee, expressed or implied, is made by LOSCO regarding the use of these data on any other system, nor does the act of distribution constitute or imply any such warranty. Distribution of these data is intended for information purposes and should not be considered authoritative for navigational, engineering, legal and other site-specific uses.