home | how to order citilabs |
 |
|||
|---|---|---|---|
 |
|||
|
|||
| |||
| |||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
| Importing and exporting | Geodemographic and other data can be imported readily from Excel or text files. Accession imports public transport data (rail and bus) including full timetables using leading formats: ATCO CIF, TransXchange and ACCMAP frequency tables. Road networks can be imported as Ordnance Survey OSCAR or Meridian and in due course, Mastermap ITN. Other road networks can also be imported using ESRI Shape or MapInfo TAB file formats. Results can be exported as CSV files for use in other applications. |
| Road Editor | Accession will recognise Ordnance Survey road feature classes and other road feature classes can be used. Road network speeds are set by km or mile by class of road and can be altered individually by clicking on a link. Road links can be suspended from the road network so that they cannot be used for routing; for example pedestrianised streets. The network editor is also used to add or remove road links, banned turns, flow or mode restrictions. Accession also uses walk links or cycle access. Walk links are used to connect intersections, origins and destinations and time/cost is calculated using the speed and maximum walk distance to represent typical travel behaviour. As an option, walk links can use weighted crow-fly distance. |
| Public Transport Editor | Accession's public transport data editor is used to add, edit, suspend or delete services and route variants. Routes using a stop can be viewed by clicking on the stop. The editor will calculate distance and times between sequences of new stops. The trip editor is used to add trips, automatically re-order trips and calculate arrival and departure times based on distance. It enables new networks to be built quickly and efficiently. Costs of travel through public transport networks are set by entering a cost per km or mile or costs can be set at the individual trip level. The PT editor checks that the stops are in a logical sequence. |
| Flexibly routed services | Accession models flexibly routed services by defining the catchment of origins and destinations that will be serviced. Criteria are added such as frequency, road speed, maximum speed, delay for wheelchairs start and end times. |
| Journey origins | Any journey origins can be used in Accession (user generated grid, households, postcodes or digitised or imported points). |
| Geodemographics | Geodemographic data are disaggregated from areas such as Census Enumeration Districts, Wards, communes or Health Areas onto origin points so that they can be re-aggregated using time or cost contours or buffer zones around stops. This generates Key Performance Indicators of the numbers and profiles of population experiencing different levels of accessibility. |
| Calculations Centre | Accession offers a number of calculation methods: Threshold Hansen/ Gravity measure, Hansen/Gravity Measure, Relative Hansen/ Gravity measure, Simple Utility or logsum measure or simple simple time-constrained accessibility and in due course PTALs. |
| Results Centre | The results centre provides a range of standard reports. Ad hoc reports can be built using Microsoft Access or any report builder with standard ODBC connections. The results table can either be reported on and contoured using Accession or exported for analysis or mapping in other packages. |
| Workspace | Accession stores session information in a workspace so that you can save work and return to it later. |
| Map Centre | Accession is built from a fully functional GIS with all the expected features including layer control, zoom settings (scale dependence) and layer fit, a selection tool, thematic mapping, raster and vector mapping, legend and scale bar, a wide variety of line styles and shading, layer transparency, text labelling and layouts. |
| Query Builder | Accession has an extremely powerful query builder for table or map-based queries that offers dynamic buffering, and operators such as inside, outside, intersecting or touching. The results of a query can be saved as a new map. Queries can also be treated as maps and used to form other queries. Accession queries are dynamic so that altering input values such as, for example, the extent of a buffer will automatically change the query results without any changes to the queries being needed. |
| Repositories | Accession currently uses an Access database to store all data in projects including map data. |