Onslow Topographic Map Sheet at 1:250,000 Scale

Australia's Onslow region is covered by a 1:250,000 scale digital topographic map from the national AUSTopo series. The series comprises 516 standard map sheets, each covering approximately 150 by 110 kilometers, with about 50 special maps for non-standard areas. It contains natural and constructed features including infrastructure, vegetation, hydrography, and 50-meter contours.

Use Cases

• Extract road and rail infrastructure features for regional transportation network analysis.
• Analyze hydrography and 50-meter contour data for watershed modeling and terrain assessment.
• Identify vegetation coverage and administrative boundaries for land-use planning studies.
• Georeference map features using GDA94/GDA2020 coordinates and UTM projection for GIS integration.

Strengths

• Part of a comprehensive national series of 516 standard topographic map sheets.
• Provides continent-wide coverage at Australia's largest published topographic scale of 1:250,000.
• Includes multiple data layers such as infrastructure, vegetation, hydrography, and contours.

Limitations

• Data is provided only in PDF format, requiring extraction for vector or raster analysis.
• Map sheets may contain information from surrounding sheets, potentially complicating precise boundary analysis.
• The description does not specify the exact date of data capture within the map sheet.

Provenance

Source

Geoscience Australia Data

Collection Method

Published digital topographic map from the AUSTopo series.

Time Range

null

Freshness

Metadata last updated March 2026.

Geography

Onslow region, Australia.