This data set contains line features representing elevation contours for the Puerto Rico quadrangles, converted from USGS Digital Line Graph (DLG) files. The contour interval is 10 meters, or 5 meters for some of the quadrangles in the coastal area.
The purpose of these data set was to facilitate the use of DLG data in a Geographic Information System software and to project the data to the State Plane coordinate system, which is a coordinate system widely used in Puerto Rico.
These data were derived from USGS Digital Line Graph (DLG) data which in turn were converted to digital from USGS 1:20,000-scale 7.5-minute topographic quadrangle maps. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. List of topographic contours shapefiles for PR (7.5 series 1:20,000) ADJUNTAS - ADTP.SHP AGUADILLA - AGTP.SHP AGUAS_BUENAS - ABTP.SHP ARECIBO - ARTP.SHP BARCELONETA - BTTP.SHP BARRANQUITAS - BRTP.SHP BAYAMON - BMTP.SHP BAYANEY - BYTP.SHP CABO_ROJO - CBTP.SHP CAGUAS - CGTP.SHP CAMUY - CMTP.SHP CAROLINA - CRTP.SHP CAYEY - CYTP.SHP CAYO_ICACOS - CCTP.SHP CENTRAL_AGUIRRE - CATP.SHP CENTRAL_LA_PLATA - CPTP.SHP CIALES - CLTP.SHP COAMO - CSTP.SHP COMERIO - COTP.SHP COROZAL - CZTP.SHP CULEBRA - CUTP.SHP, CWTP.SHP EL_YUNQUE - EYTP.SHP FAJARDO - FATP.SHP FLORIDA - FLTP.SHP GUANICA - GATP.SHP GUAYAMA - GMTP.SHP GURABO - GRTP.SHP HUMACAO - HUTP.SHP ISABELA - ISTP.SHP JAYUYA - JATP.SHP JUNCOS - JUTP.SHP MANATI - MNTP.SHP MARICAO - MRTP.SHP MAYAGUEZ - MATP.SHP MOCA - MCTP.SHP MONA - MOTP.SHP MONTE_GUILARTE - MGTP.SHP NAGUABO - NGTP.SHP NARANJITO - NJTP.SHP OROCOVIS - ORTP.SHP PARGUERA - PETP.SHP PATILLAS - PATP.SHP PENUELAS - PSTP.SHP PLAYA_DE_PONCE - PLTP.SHP PONCE - POTP.SHP PUERTO_REAL - PRTP.SHP PUNTA_CUCHARA - PCTP.SHP PUNTA_GUAYANES - PGTP.SHP PUNTA_PUERCA - PPTP.SHP PUNTA_TUNA - PTTP.SHP PUNTA_VERRACO - PVTP.SHP QUEBRADILLAS - QUTP.SHP RINCON - RITP.SHP PUNTA_HIGUERA - PHTP.SHP RIO_DESCALABRADO - RDTP.SHP RIO_GRANDE - RGTP.SHP ROSARIO - ROTP.SHP SABANA_GRANDE - SGTP.SHP SALINAS - SLTP.SHP SANTA_ISABEL - SITP.SHP SAN_GERMAN - SNTP.SHP SAN_JUAN - SJTP.SHP SAN_SEBASTIAN - SSTP.SHP UTUADO - UTTP.SHP VEGA_ALTA - VATP.SHP VIEQUES - VETP.SHP, VCTP.SHP, VWTP.SHP YABUCOA - YATP.SHP YAUCO - YOTP.SHP
The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. These data should not be used at scales greater than 1:20,000. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale.
GSA Center 651 Federal Dr 400-15
This work was done in cooperation with the local PR government agencies of the umbrella program
Chain-node topology present. Topological requirements include lines must begin and end at nodes, lines must connect to each other at nodes, lines do not extend through nodes, left and right areas are defined for each line element and are consistent throughout the file, and the lines representing the limits of the file (neatline) are free of gaps.
Data completeness reflects the content of the source quadrangle.
Same as source DLG
Line features representing topographic contours. Digital vector format DLG-3
This data set was generated by converting USGS Digital Line Graph topographic data for the 1:20,000 Puerto Real quadrangle of Puerto Rico to the ESRI coverage format. The resulting coverage was projected from the original Universe Transverse Mercator (UTM) projection to the State Plane coordinate system for Puerto Rico (Lambert Conformal Conic projection). The elevation of the contour was assigned to ELVMTS (AAT item) to facilitate using the attributes. The vector GIS software attributes. The vector GIS software Arc/Info (by ESRI) was used to process the files. The coverage was converted to the ESRI shapefile format The source Digital Line Graph was digitized from the USGS quadrangle, by either the National Mapping Division, one of their cooperators, or one of their contractors. The digital data were produced by one of the following methods: - scanning a stable-based copy of the graphic materials. The scanning process captured the digital data at a scanning resolution of at least 0.001 inches; the resulting raster data were vectorized and then attributed on an interactive editing station. - scanning the paper map. The scanning process captured the digital data at a scanning resolution of at least 0.001 inches; the resulting raster data were vectorized and then attributed on an interactive editing station. - scanning a stable-based copy of the graphic materials. The resulting raster data were then manually digitized and attributed on an interactive editing station. The resolution of the digital data is at least 0.001 inches. - scanning the paper map. The resulting raster data were then manually digitized and attributed on an interactive editing station. The resolution of the digital data is at least 0.001 inches. - manually digitizing from a stable-based copy of the graphic material using a digitizing table to capture the digital data at a resolution of at least 0.001 inches; attribution was performed either as the data were digitized, or on an interactive edit station after the digitizing was completed. - manually digitizing from the paper map using a digitizing table to capture the digital data at a performed either as the data were digitized, or on an interactive edit station after the digitizing was completed. The determination of the DLG production method was based on various criteria, including feature density, feature symbology, and availability of production systems. Four control points corresponding to the four corners of the quadrangle were used for registration during data collection. An eight parameter projective transformation was performed on the coordinates used in the data collection and editing systems to register the digital data to the internal coordinates used in PROSYS, and a four parameter linear transformation was performed from the PROSYS internal coordinates to Universal Transverse Mercator (UTM) grid coordinates. The DLG data were checked for position by one or more of the following processes: - comparing plots of the digital data to the graphic source. - comparing the digital data to the digital raster scan. DLG data classification was checked by at least one of the following processes. - comparing plots of the digital data to the graphic source - comparing the digital data to the digital raster scan.
Line features between adjacent quadrangles were edgematched by the USGS Caribbean District
First draft of metadata created by email@example.com using FGDCMETA.AML ver. 1.35 08/02/2000 on ArcInfo data set m:\pr-data\qd-data\dlg\topo\prtp02
Internal feature number.
Items from FNODE# to -ID are default columns of an arc/info arc attribute table (AAT) ELVMTS - elevation in meters of the topographic contour. DPRFLG - 1 if the contour represents a depression 0 not a depression >XX represents two character quadrangle abbreviation >XXTP02.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 8 18 F 5 > 25 XXTP02# 4 5 B - > 29 XXTP02-ID 4 5 B - > 33 ELVMTS 6 6 I - ELEVATION > 39 DPRFLG 2 2 I - DEPRESSION > > >PRTP02.NAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 ARC# 4 5 B - > 5 XXTP02# 4 5 B - > 9 XXTP02-ID 4 5 B - > 13 NODESYM 3 4 I - > >
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Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
GSA Center 651 Federal Dr 400-15