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Using the Spatial Improvement Assessment App

Last modified on February 22, 2021

To provide transparency into operational planning, the Spatial Improvement Assessment app delivers visual insights into the objective analysis used by the ParcelMap BC Operations team to plan and prioritize spatial improvement work across the province.

Regularly updated, this app provides a view into the assessed accuracy of the parcel fabric, broadly identifying Assessed Accuracy of the Parcels across the province based on the distance to known control points. The app also highlights Candidate Areas for improvement based on criteria that indicates whether the area is adjustable, as well as previously Adjusted Areas.

Candidate Areas may become Spatial Improvement Areas of Interest or, the targeted candidate areas most in need of improvement. Completed areas are also displayed along with the date of completion and the assigned name.

More information on map navigation and other tools--as well as a description of the map layers available in the app--can be found in the two sections below. Please contact myLTSA Tech Support if you have additional questions or require support for the ParcelMap BC Spatial Improvements Assessment app.

Map Navigation and Tools

ICON LABEL DESCRIPTION
LEGEND
LEGEND Displays a legend for the layers currently visible in the map.
LAYER LIST
LAYER LIST Displays a list of all operational and reference layers in the app and provides the ability to toggle whether the layer is active. Layers listed in lighter text are not visible at the current zoom level. A description of each layer (including a legend) can be found in the Map Layers in the App section below.
QUERY AREA of INTEREST by STATUS
QUERY AREA of INTEREST by STATUS Query Area of Interest layer based on the status of the spatial improvement for the defined area.
PRIORITY TARGETS QUICK FIND
PRIORITY TARGETS QUICK FIND Spatial bookmarks for quick navigation to identified Priority Target areas for spatial improvement.
COMPLETED AREAS QUICK FIND
COMPLETED AREAS QUICK FIND Spatial bookmarks for quick navigation to areas where spatial improvements have been completed.
PRINT
PRINT Advanced or basic printing of the current map.
BASEMAP GALLERY
BASEMAP GALLERY Presents a gallery of basemaps and allows the user to select one.
DRAW
DRAW Draws basic graphics and text on the map.
ADJUSTMENT READINESS SUMMARY
ADJUSTMENT READINESS SUMMARY

Summarizes the number of Areas of Interest, Candidate Areas.

The layer must be active in the Layer List to be included in the summary.

SEARCH
SEARCH

Interactive text-based search for locating and navigating to a location on the map based on multiple sources:

  • Areas of Interest: Locate by Name from Areas of Interest;
  • ArcGIS World Geocoding: Locate by Address or locale;
  • ParcelMap BC Parcel Fabric: Locate by PID (9 characters with padded zeros), PIN or Plan Number (with prefix) from ParcelMap BC Parcel Fabric;
  • Municipalities: Locate by Name from Municipalities;
  • Regional Districts: Locate by Name from Regional Districts.
ABOUT
ABOUT Provides information about the app, including access to Help, a list of current Priority Targets, as well as Completed Areas for Spatial Improvements.
ZOOM IN/OUT
ZOOM IN/OUT Click to zoom in or out from the current extent.
HOME
HOME Click to zoom to the map's starting extent.
MY LOCATION
MY LOCATION Detects the user's physical location and zooms to it on the map.
NEXT / PREVIOUS EXTENT
NEXT / PREVIOUS EXTENT Allows user to navigate the map to its previous or next extent.
COORDINATE
COORDINATE Displays coordinates in the current map projection when moving the pointer on the map, or in other coordinate systems by clicking on the map.
OVERVIEW MAP
OVERVIEW MAP Shows the current spatial extent of the map display as a gray rectangle relative to the entire spatial extent of the basemap service.
APP STATE
APP STATE Click to restore the map extent and layers' visibility to where the user left off.
     

Map Layers in the App Parcel Map BC Spatial Improvement Assessment

SPATIAL IMPROVEMENT ASSESSMENT LAYERS To add the ArcGIS Online content please visit the associated hyperlinks
Spatial Improvement Areas of Interest
Spatial Improvement Areas of Interest

Areas identified as priority targets for spatial improvement. These include areas that are identified as Targets, In Progress, and Complete.

Complete areas will be labelled with the date of completion and an assigned name.

 

Relative Adjustment Vectors
Relative Adjustment Vectors

These features represent the relative magnitude and direction of parcel points to their known control positions.  This helps identify local trends in fabric accuracy and is a relative representation of how parcels may move with a spatial improvement.  The class breaks are based on the estimated Distance to Control. 

 

Candidate Area:

Candidate Area 1km2

These 1km² hexagons represent candidate areas to consider as targets for spatial improvements based on an intersection of:

  1. Areas with a high density of control,
  2. Areas in need of adjustment where the median Distance to Control is greater than two metres.

In planning, candidate areas are generally used to help identify Spatial Improvement Areas of Interest.

 

Adjusted Area:

Adjusted Area 1km2

These 1km² hexagons represent areas that have previously been adjusted. 

 

Assessed Accuracy (Maximum Residual):

Assessed Accuracy (Maximum Residual): 1km2 hexagons

These 1km² hexagons represent areas of the parcel fabric summarized based on the maximum distance of a given parcel point to its known control position or the maximum assessed positional accuracy of a given parcel.

Undetermined indicates areas of the parcel fabric where not enough active control points exist to assess accuracy. These include areas that have previously been adjusted, but the quality of adjustment is unverified due to lack of control points in the given sample hexagon.

 

Assessed Accuracy (Average Distance to Control):

Assessed Accuracy (Average Distance to Control): 20km2 hexagons

These 20km² hexagons represent areas of the parcel fabric summarized based on the distance of parcel points to their known control positions. 

 

Parcel Improvements (Adjusted Parcels):

Parcel Improvements (Adjusted Parcels)

These 20km² hexagons outline areas where a significant number of parcels have been adjusted and improved. 

 
     
REFERENCE LAYERS
Integrated Survey Areas
Integrated Survey Areas
This app features the mapped representation of Integrated Survey Areas as available on the BC Data Catalogue.
ParcelMap BC Parcel Fabric
ParcelMap BC Parcel Fabric
This app features the Open Government view of the ParcelMap BC parcel fabric, available from the BC Data Catalogue (refreshed weekly).
Municipalities  
This app features the mapped representation of Municipalities as available on the BC Data Catalogue.
Regional Districts
Regional Districts
This app features the mapped representation of Regional Districts as available on the BC Data Catalogue.
     

Hexagon Attributes

Hexagons are provided at different two different scales: 1 km², 20 km². Visibility of the different sizes is dependant on the zoom scale of the map.

Each hexagon has a unique ID (GRID ID), as well as several other attributes. You can query these attributes by clicking on the centre of the hexagon.

Hexagon Attributes
Field Name Definition
GRID ID The Hexagon ID
Active Controls Number of Active Control Points
Survey Plan Datasets Number of High Accuracy Survey Plan Datasets
Edited The last date this hexagon was edited in the application
   
Improvement Category:  
Not enough controls The hexagon does not have enough control points to be spatially improved.
Adjustable The hexagon has enough control to be improved; however, the points are within 3m of their true location, indicating that it is not a priority area for spatial improvement.
Candidate for Adjust The hexagon has enough control to be improved and there are points that are 2m or more away from their true control location. Furthermore, less than 50% of the area has been previously adjusted making this hexagon a good candidate for spatial improvement.
Candidate for Re-adjust Most of the hexagon has been previously adjusted. However, there are still points that are 1m or more away from their true control location. This is a good candidate area for re-adjustment.
Adjusted 85% or more of the hexagon has been previously adjusted.
   
Parcel Quality:  
Undetermined Areas of the parcel fabric where not enough active control points exist to assess accuracy. These include areas that have previously been adjusted, but the quality of adjustment is unverified due to lack of control points in the given sample hexagon.
> 20m At least one point is 20m off (or more) from its expected position.
<= 20m At least one point 20m off its expected position.
<= 5m At least one point is 5m off its expected position.
<= 2m At least one point is 2m off its expected position.
<= 1 m Points are within 1m of their expected position.