Adding to this...
If I view the page source and look at the section calling the images ( SEE 
SECTION BELOW )
Clicking on the image initially shows the cached image , doing a refresh 
shows the updated 'unshown' image.
So there needs to be a way to tell the browser to reload all the images 
without the viewer having to type in anything special, or the image 
generator itself is perhaps missing something to indicate to browsers that 
it's been updated. 
Any ideas or clues. Is this just me?

<div id="plots">
<img src="daytempdew.png <http://www.spider-e.com/rob2/daytempdew.png>" alt
="temperatures" />
<img src="daytempchill.png <http://www.spider-e.com/rob2/daytempchill.png>" 
alt="heatchill" />
<img src="dayhumidity.png <http://www.spider-e.com/rob2/dayhumidity.png>" 
alt="outside humidity" />
<img src="dayrain.png <http://www.spider-e.com/rob2/dayrain.png>" alt="rain" 
/>
<img src="daywind.png <http://www.spider-e.com/rob2/daywind.png>" alt="wind" 
/>
<img src="daybarometer.png <http://www.spider-e.com/rob2/daybarometer.png>" 
alt="barometer"/>
<img src="daywinddir.png <http://www.spider-e.com/rob2/daywinddir.png>" alt
="Hi Wind" />
<img src="dayinside.png <http://www.spider-e.com/rob2/dayinside.png>" alt="
Inside" />
<img src="daywindvec.png <http://www.spider-e.com/rob2/daywindvec.png>" alt
="Wind Vector" />
</div> <!-- End id "plots" -->



On Friday, 7 December 2018 21:07:41 UTC, Rob Field wrote:
>
> The answer appears to be the cache in chrome. Although the report time was 
> being updated correctly, the images were not. When viewing the ftp'd data 
> on a different computer that hadn't accessed the web page before, the 
> results were as expected. Having cleared the browsers cache, all reports 
> were then as expected.
> I don't know how the cache works but it seems that the changes made and 
> published in the report are not sufficient to get the browser to completely 
> reload the published form.
> Check out the two page images attached, they have different heading times, 
> but the graphs are stamped with the same older time. ( the time just after 
> the cache was cleared ).
> This would seem to be an inherent problem rather than caused by me 
> changing a text string. ( Perhaps ?) Although others must be getting 
> correct updates I presume, so perhaps something else is needed to force a 
> full browser reload  upon each refresh.
>
>
>
>
> On Thursday, 6 December 2018 23:30:26 UTC, gjr80 wrote:
>>
>> On thinking some more the situation you describe does not exactly fit 
>> with the default weeWX image generation times but it may be part of the 
>> issue. Do force regeneration of the image files as I suggested and then 
>> have another look at things, at least that will take one variable out of 
>> the equation. If there are still issues copies of what you see locally and 
>> remotely would help.
>>
>> Gary
>>
>> On Friday, 7 December 2018 09:23:52 UTC+10, gjr80 wrote:
>>>
>>> Hi,
>>>
>>> By default year images are only generated once per day, month every 
>>> three hours, week every one hour and day every report cycle. After you make 
>>> a config change try deleting all of the week, month and year images (or for 
>>> that matter all the images) to force them all to be regenerated on the next 
>>> report cycle.
>>>
>>> Gary
>>>
>>> On Friday, 7 December 2018 09:11:23 UTC+10, Rob Field wrote:
>>>>
>>>> I'm customising the report and database to include a different type of 
>>>> measurement. In this instance it would be pH value.
>>>> Since this is all new I'm making small changes and observing the 
>>>> results , first plan to simply change the Wind Chill Graph to show 'pH'
>>>> I've successfully? removed 'heat index' text and replaced it with 'pH' 
>>>> in the database and also in the standard skin.conf.
>>>> Running the simulator as a test works - I think I changed the simulator 
>>>> to output 'pH' but there's an interesting difference between what I see 
>>>> when viewing the output using file:///var/www/html/weewx/ and when I view 
>>>> the report on a cloud web page that it gets sent to.
>>>> On the 'file' view I still see the text 'Heat Image' after the 'Wind 
>>>> Chill' graph on the yearly plot but on all others I see  'pH' as 
>>>> anticipated.
>>>> From the Web view, I still see 'Heat Index' after 'Wind Chill' on all 
>>>> reports EXCEPT the monthly one.
>>>> I've not changed anything in the Template - just the skin.conf. 
>>>> Regardless of me even doing it correctly I would have thought the local 
>>>> and 
>>>> web report should be the same.. everything else matches including the data 
>>>> time stamp so I know that both are being regenerated - just they don't 
>>>> match.
>>>>
>>>> Attached image shows what I get ( want) , but not consistent, and 
>>>> skin.con has no text 'Heat Index' in it at all. I could be from the 
>>>> template,  but even so I haven't changed that at all.
>>>> I've read through much of the docs, but can't find anything that 
>>>> explains all the skin.conf  [[  ]]   [[[   ]]] brackets clearly enough for 
>>>> me to know what to do with out actually doing something and see.
>>>>
>>>>

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