gsi-bedrock-outcrop
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| Téama | Eolaíocht |
|---|---|
| Dáta eisithe | 2003-10-07 |
| Dáta nuashonraithe | 2019-05-14 |
| Cloíonn an tacar sonraí leis na caighdeáin seo | The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment. |
| Nótaí Cearta | {"Creative Commons license conditions apply",https://creativecommons.org/licenses/by/4.0/,license,https://creativecommons.org/licenses/by/4.0/,license} |
| Minicíocht Nuashonraithe | Eile |
| Teanga | English |
| Lamairne | https://dcenr.maps.arcgis.com/apps/webappviewer/index.html?id=de7012a99d2748ea9106e7ee1b6ab8d5&scale=0 |
| Clúdach Geografach i bhformáid GeoJSON | {"type":"Polygon","coordinates":[[[-11.0, 50.0],[-11.0, 56.0], [-5.0, 56.0], [-5.0, 50.0], [-11.0, 50.0]]]} |
| SRS | Irish Transverse Mercator (ITM, EPSG:2157) |
| Méid Ingearach | {"maxVerticalExtent": "1041", "verticalDomainName": "sea level", "minVerticalExtent": "0"} |
| Eolas Dualfhoinse | Geologists map and record information on the composition and structure of rock outcrops (rock which can be seen on the land surface) and boreholes (a deep narrow round hole drilled in the ground). Areas are drawn on a map to show the distribution of rocks. Originally, the bedrock was hand drawn on paper maps. All map sheets (21) are available in paper copy accompanied by a geological report. Phase 1: The 21 paper maps covering Ireland were digitised. Each map was manually digitised using AutoCAD 12.0 software. Several layers of data were created for each map sheet: Stratigraphy, Lithology, Igneous, Diagenetic, Dynamic, Thermal, Linework and Point symbols and stored in .dwg format. The data was registered to the OSi 1:100,000 digital rasters. The data was clipped to the OSi coastline (high water mark). Water bodies such as lakes were also clipped. Irish National Grid (IG) projection. Phase 2: Data was converted to ArcInfo coverages (1994-2003) IG AutoCAD layers were converted to .dxf format and imported into ArcInfo 7.x. Coding was used to attach attribute information to the data layers from the bedrock lexicon table. A legend was generated. The ArcInfo coverages were converted to shapefiles. Phase 3: Borders and overlaps between map sheets were removed. IG. ArcGIS 8.x and Microsoft Access were used. Access was used to join additional attributes to the data layers including a unique code called NEWCODE. ArcGIS 8.x was used to manually remove borders and overlaps and to fill gaps. Work was carried out by GIS staff in close collaboration with bedrock geologists. The final product was quality checked by bedrock geologists. A stylefile was generated. Shapefiles produced were: 1) Final100kunion.shp - A polygon shapefile that contains bedrock geological information on Stratigraphy, Igneous, Lithology and Diagentic codes, their unit names and descriptions, 2) Index100Map.shp – A polygon index of 1:100,000 scale map sheets to allow sheet number identification at 100,000 scale. 3) Final100kstruc.shp (Structural Linework) - A line shapefile that contains structural geological linework codes and descriptions. 4) Final100kstra.shp (Stratigraphic Linework) - A line shapefile that contains stratigraphic geological line codes and descriptions. 5) Cross100ksection (Cross sections) - A line shapefile that contains map sheet cross sections as per paper printed maps and provides links to the cross sections in image format. 6) Final100kmin.shp - A point shapefile containing selected mineral and quarry descriptions from Bedrock 1:100,000 map series. Phase 4: Bedrock 1:100,000 Map 2016 ITM New data was compiled and interpreted from the following sources: Tellus geophysics data (magnetic, electromagnetic, radiometric data), Tellus geochemistry data, borehole data and micropaleontology analysis. Higher resolution maps (1:50,000) were generated from the new data. When this information changes the distribution of the areas of rock, we update this 1:100,000 map with the changes. New data has been added into this dataset from sheets 28A, 77 and parts of Dublin and Galway. The data for Sheets 28A and 77 were produced as part of a 1:50,000 project and the Dublin and Galway data were produced as part of the GeoUrban project. Bedrock Map re-projected in ArcGIS from Irish National Grid (IG) to Irish transverse Mercator (ITM) projection. Updated the Irish coastline (ITM): geology filled in water bodies and locating and amending discrepancies between paper maps and digital version. Bedrock aquifer categories were added. Stylefile updated. Data topology checked. The dataset comprises 4 shapefiles. 1) Bedrock_Polygons_ITM_2016.shp - A polygon shapefile that contains bedrock geological information on Stratigraphy, Igneous, Lithology and Diagentic codes, their unit names and descriptions. It also contains Bedrock aquifer categories. It is linked to the bedrock lexicon table which has more detailed information such as descriptions of the stratigraphy, lithology, rock types, age, thickness and other comments. 2) Geological_Linework_100k_2016.shp - A line shapefile that contains structural geological linework codes, stratigraphic geological line codes and descriptions and cross section . It is linked to the bedrock lexicon table which has more detailed information such as descriptions of the stratigraphy, lithology, rock types, age, thickness and other comments. 3) Struct_Symbols_100K_ITM_2016.shp - a point shapefile that contains all symbols and dip labels from the 1:100,000 paper map series. 4) Bedrock_Outcrop_ITM_2016.shp - A polygon shapefile that shows rock outcrops. Phase 5: Bedrock 1:100,000 2018 ITM. New data was compiled and interpreted from the following sources: Tellus geophysics data (magnetic, electromagnetic, radiometric data), Tellus geochemistry data, borehole data and micropaleontology analysis. Higher resolution maps (1:50,000) were generated from the new data. When this information changes the distribution of the areas of rock, we update this 1:100,000 map with the changes. New data has been added into this dataset from sheets 24, 26, 27.1,28.1 32, 33, 34, 35, 39 and 40 corresponding to the counties of Sligo, Mayo, Roscommon, Galway, Leitrim, Cavan, Louth, Meath, Monaghan and Longford. Errors noted and recorded in the previous version were corrected. Data topology checked. The dataset comprises 4 shapefiles. 1) Bedrock_Polygons_ITM_2018.shp .- A polygon shapefile that contains bedrock geological information on Stratigraphy, Igneous, Lithology and Diagentic codes, their unit names and descriptions. It also contains Bedrock aquifer categories. It is linked to the bedrock lexicon table which has more detailed information such as descriptions of the stratigraphy, lithology, rock types, age, thickness and other comments. 2) Geological_Linework_100k_2018.shp - A line shapefile that contains structural geological linework codes, stratigraphic geological line codes and descriptions and cross section . It is linked to the bedrock lexicon table which has more detailed information such as descriptions of the stratigraphy, lithology, rock types, age, thickness and other comments. 3) Struct_Symbols_100K_ITM_2018.shp - a point shapefile that contains all symbols and dip labels from the 1:100,000 paper map series. 4) Bedrock_Outcrop_ITM_2018.shp - A polygon shapefile that shows rock outcrops. |
| Tréimhse ama clúdaithe (tús) | 2003-01-20 |
| Tréimhse ama clúdaithe (deireadh) | 2012-01-11 |
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