Read a map’s source dates and limits before using it in a listing

A map needs more than a familiar outline

You have found a useful map for a farmland brochure. The outline fits the listing and the colours are easy to read, but the source note sits on another page. Before you copy the image, work out what a buyer would understand from seeing it on its own.

Start with the sentence you want the map to support. Are you showing the terrain represented in a named model, the years included in a dataset or the location of mapped records? Write that purpose in your working notes. It gives you a specific claim to check against the map’s dates and limits.

The routine below is a suggested reading and editing check. Use it before placing a map in a brochure, listing page or showing sheet, following your brokerage’s process and the terms that apply to the material.

Separate the period shown from the date retrieved

Read each date with its label. A dataset year or observation period tells you which period the information describes. A publication or revision date tells you when that version was issued. A retrieval date records when the source was consulted. The issue date of a report belongs to the report itself. Keep these meanings separate in your notes.

A report prepared recently may contain information about an earlier period. Opening it today does not move that information forward. Before writing “current” or “latest” beside a map, identify the evidence that supports that word for the particular statement you are making.

Where a date is missing, record it as unavailable. Do not substitute the date you downloaded a file for the date its features were observed or updated. If the missing date matters to your intended caption, leave that claim pending and check the publisher’s documentation.

Read the legend and limits as part of the map

Read the layer name, legend, units, resolution or scale, coverage notes and any explanation of accuracy. Ask whether the source describes the detail your caption points to. Enlarging an image makes its marks bigger; it does not supply evidence for a more detailed claim.

Keep “not shown” separate from “not present”. Check whether an uncoloured area means no data, a category in the legend or no matching result from a stated search. Use the source’s explanation rather than choosing a meaning from the appearance of the image.

Then compare the intended sentence with the limit you just read. A caption about mapped terrain should stay within what the terrain source describes. A search result should retain the named source, date and search limits. If the sentence needs evidence beyond the map, obtain that evidence or narrow the sentence.

Keep the reading context beside the excerpt

Decide which labels a reader needs when the map leaves its original page. Keep the relevant legend, orientation, scale information and source note legible. If the layout cannot hold that context, choose a larger presentation or direct the reader to the complete page rather than squeezing the labels into unreadable type.

A crop of the image can remove the very note that bounds your caption. Read the excerpt together with its new heading and nearby text. Check that an added arrow or label is clearly your annotation and cannot be mistaken for something the source publisher supplied.

Check the source’s reuse terms before publishing the excerpt. Retain the required attribution and any accompanying conditions. A source link helps a reader find the material, but you still need to check the terms for the particular use you intend.

Use Ironpost’s source notes as your starting point

Ironpost’s public sample and source guidance, checked on October 9, 2026, show source names, licences, resolution and retrieval dates in the cited PDF land report. Start with the relevant report section, then read its source notes and the Sources & method table together.

The sample includes different retrieval dates for different layers. Read the date for the layer you are using instead of treating the report’s issue date as the date of every underlying source. Keep any limitation printed with that section in view when preparing your caption.

These references give you a route back to the material behind the map. They do not make a report an ongoing feed of changes to the land. Use the actual report you intend to cite, and check any additional information needed for the statement in your listing.

Finish with a clear reuse decision

Before publication, record the map or report reference, the layer and period shown, the retrieval date, the caption you approved and the limits you retained. Note where you placed the excerpt so you can find it again when revising the listing.

Decide whether the map supports the caption as written, needs a narrower caption or needs further source checking before use. Open the finished material at the size a reader will see and confirm that the labels and notes remain readable. Explore the Ironpost sample report below to practise reading a map alongside its dates and source limits.