Home /Processing/Processes

Orthorectification

An algorithm that corrects geometric distortions in multispectral imagery using digital terrain models.

Overview

The process applies orthorectification to multispectral primary imagery. It uses Intermap’s NEXTMap DTMs to remove distortions caused by terrain variations, camera angle, and other factors. The result is an orthorectified GeoTIFF file.

Orthorectification can be used as a preprocessing step before ground measurements, change detection, land use management, and map creation.

An input Beijing-3N image of Nizwa (Oman) with highlighted reference roads
An orthorectified output image with the same highlighted reference roads

General

Specification Description
Provider Intermap
Process type

Enhancement from 250 credits per km2

Requirements for input imagery

Input data items must come from a CNAM-supported collection and be added to storage in 2023 or later.

CriteriaRequirement

Product type

Input data items must come from a multispectral collection.
Processing levelInput data items must be at the primary geometric processing level.
RPC fileInput data items must have an RPC file.

Input parameters

Use the orthorectification-intermap name ID for the processing API.

JSON
{
  "inputs": {
    "title": "Processing imagery over Berlin",
    "item": "https://api.up42.com/v2/assets/stac/collections/21c0b14e-3434-4675-98d1-f225507ded99/items/23e4567-e89b-12d3-a456-426614174000"
  }
}
Parameter Overview
inputs.title string | required

The title of the output data item.
inputs.item string | required

The absolute API path to the input data item.

Learn more