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The widget never shows a browser error or a blank box. When it has nothing to show, it says why in one sentence, under the heading “Development likelihood nearby”, with a “Powered by Check That Field” link.

Scores to show

The usual answer. Readers see:
  • The nearest field with a score, for example “The nearest field with a score, 140 m away”, with its band in large text, its score (“52 out of 100”) and a bar.
  • Next 5 years and Next 15 years: the outlook over each.
  • The main reasons: up to three, each marked as making building more or less likely.
  • Fields nearby: up to five, nearest first, with distance, size and band. Bands are written as words, not shown by colour alone.
  • A map of the same fields, numbered as in the list.
  • See the full report, which opens the nearest scored field’s report on checkthatfield.com in a new tab.
  • The data credits, which you must not hide.

Being checked

Fields we haven’t scored yet show “Being checked” in the list, with the note “Fields being checked have their score in a few minutes.” Asking about them queues them for scoring, so a later visit shows their scores. If none of the nearby fields has a score yet, the top of the widget says:
The fields here are being checked. Their scores will be ready in a few minutes.
The link then reads See these fields on the map. See Pending scores for how scoring on request works.

Messages

The key is missing, unknown, revoked, or not issued for the site the widget is on. Check that data-key is your publishable key (ctf_pk_live_…), and that the page’s domain, or a domain it is a subdomain of, is one of your key’s sites. It also appears when your page sends no Referer: see the note on referrer policy in Install the widget. To add a site, email hello@checkthatfield.com.
Your key has used its monthly quota. It comes back at the start of next month (UTC). Ask us for a bigger quota if you need one. See Quotas and limits.
Your key has gone over its rate limit of 600 widget loads a minute. This passes within a minute.
There are no open fields within 500 m, the place is outside England, the postcode wasn’t found, or no place was given. Check the data-postcode, or the data-lat and data-lng. See Coverage.
The coordinates aren’t numbers, or are outside the ranges in Options.
Something went wrong on our side, or the answer took too long. It is usually brief. If it lasts, tell us at hello@checkthatfield.com.
Views and clicks are counted only when the widget shows fields. A widget showing one of the messages above isn’t counted as a view. See Security and privacy.