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author • photographer • silvologist
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measure

measuring the angle of elevation with a smartphone

How to calculate tree height using a smartphone

2011-05-15
On: 15th May 2011
In: feature, forestry, science, technology, trees

Foresters use a clinometer to calculate the height of a tree. These can be quite expensive to buy but it is quite possible to achieve good results with a smartphone. Here’s a method that I’ve developed …Continue Reading

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My Books & Book News

Fiction and Non-fiction writing by Gabriel Hemery. Read more about my books or click the titles below:

The Tree Almanac 2024
The Forest Guide: Scotland
The Wolf, The Walnut and The Woodsman
Tall Trees Short Stories Vol21
Tall Tree Short Stories Vol20
Green Gold
The New Sylva

Gabriel Hemery's books
Gabriel Hemery's books
  • Celebrating the Autumn Equinox with Trees

    My article in Gardens Illustrated celebrating the autumn equinox with the trees came out this week. It was also published to coincide with the forthcoming publication of my next book, The Tree Almanac 2024

  • A seductive mix of science, history and culture

    I am excited to announce that the foreword to my next book, The Tree Almanac 2024, has been penned by the brilliant Tracy Chevalier, who writes that the book is ‘a seductive mix of science, history and culture’.

  • Scottish Forestry Review

    The Forest Guide Scotland by Gabriel Hemery – “an attractive, well-bound and portable paperback” review by the Royal Scottish Forestry Society

Tree Photography

Read about my tree photography on my page, or enjoy a sample of images at photos.gabrielhemery.com.
You can also follow me on 500px, Instagram, and Behance.

gabrielhemery

author • tree photographer • silvologist

Gabriel Hemery
Robinia Rain - fresh raindrops on young leaves and Robinia Rain - fresh raindrops on young leaves and thorns of Robinia pseudoacacia #trees #rain #leaves #nature #weather #seasons
Wales: where gold rises in the forests and flows f Wales: where gold rises in the forests and flows forth as water. #trees #forests #wales #verse #words #nature #books. For my next guide to Britain’s forests with @bloomsburypublishing , see Bio.
So I’ve been struck down with Covid this week. V So I’ve been struck down with Covid this week. Very slow walks with the dog are about all I’ve managed. A good time to pause and write some poetry, inspired by nature and by the softening light of autumn.  #poetry #nature #covid #walks #countryside
And the ash leant towards the moon and whispered, And the ash leant towards the moon and whispered, ‘remember me when I am no more.’ The clouds scudded and shivered, lost in thought. The moon wept a thousand silver tears. And me? I held her as the earth spun through eternity.  #verse #trees #nature #moonlight
Time to update the mugshot, as it seems I’m agin Time to update the mugshot, as it seems I’m aging less well than my trees #selflove #trees #portrait
Great to see my article in @gardens_illustrated t Great to see my article in  @gardens_illustrated this month, celebrating the exotic jewels and hidden treasures of trees in autumn. Part of the promotion of my next book The Tree Almanac 2024 with @booksbyrobinson https://www.gardensillustrated.com/features/autumn-equinox-trees
There I was looking for trees to feature in my nex There I was looking for trees to feature in my next Forest Guide when a thundering of hooves hinted at strange goings on at @blenheimpalace! What an  amazing spectacle @blenheimhorse is when you can see the fear and determination written large on the faces of the women and men who tackle this fearsome woodland equestrian course. #trees #woodland #horses #equestrian #crosscountry
Oak Apple gall. A great time of the year to brush Oak Apple gall. A great time of the year to brush off those cecidological skills! #galls #trees #cecidology
Enjoyed delivering a talk to students, foresters, Enjoyed delivering a talk to students, foresters, and landowners at @slu.alnarpsparken in Sweden yesterday. Talking valuable noble hardwoods. Focus for the day was  on #walnut, #wildservice and #turkishhazel trees. All high value timber trees needing much care and attention by the forester.  Great discussions in a beautiful setting with bright students. Inspired to write something more about this subject and maybe get some new research underway in the UK. Thanks to @slu.alnarpsparken
Caught myself this morning, wondering how many liv Caught myself this morning, wondering how many lives I’d nurtured, loved and lost. About my touch on this Earth during my fleeting passage. Do I see in my hands the shaping of a life by forces and deeds in nature, like those of an epic landscape carved by wind and water? 
Before the thoughts evaporate; a fleeting moment before another day begins. #reflections #selfawareness #naturephilia #mindfulness
Is this beauty in an Oxfordshire wood Carabus auro Is this beauty in an Oxfordshire wood Carabus auronitens? Not supposed to be in the UK. Any coleopteristists who can help? @bbowt @naturalengland @beetlebotherer @forestryengland #beetle #nature #naturephotography
Freaky nature - knopper gall on pedunculate oak ac Freaky nature - knopper gall on pedunculate oak acorn #galls #cecidology #oak #trees #nature #freaky
Hidden deep within a Welsh forest dripping with mo Hidden deep within a Welsh forest dripping with mosses and ferns, another spectacular waterfall, far from the beaten path. It will feature as one of the ‘difficult’ options in The Forest Guide Wales coming next year with @bloomsburypublishing but don’t worry, there will be lots of options to suit all abilities and interests  #trees #forests #wales #nature #backtonature #waterfall
Trembling Aspen - the petioles (stalks) of aspen l Trembling Aspen - the petioles (stalks) of aspen leaves are flattened allowing them to ‘tremble’ in the lightest of breezes. You can identify an aspen tree with your eyes shut, by sound alone.  #trees #wales #nature #botany
The fly, the oak and the spotted flycatcher - supe The fly, the oak and the spotted flycatcher -
super excited to finally capture an image of a feeding spotted flycatcher. In the high res version you can even see the bird’s next meal. Captured this while in the fabulous temperate rainforests of West Wales for my next book 🌳The Forest Guide Wales 🏴󠁧󠁢󠁷󠁬󠁳󠁿 #trees #woods #birds #photography #wales #temperaterainforest
Robin ruffle-puffle Another great day of fieldwork Robin ruffle-puffle
Another great day of fieldwork completed for The Forest Guide Wales yesterday, despite the rain. I spotted this bedraggled robin sheltering from a downpour in an oak canopy. #trees #birds #robin #woodland #forest #wales #rain
Stopped by to pay respects to one of the largest a Stopped by to pay respects to one of the largest ash trees in Wales near Talley Abbey. I was more moved than I care to admit, in awe of her size and beauty. In quite good health too. Pics fail to capture her majesty. I had to include myself just to provide some sense of scale. #trees #ancient #nature #ash #hedgerow #wales
What a beauty! A death’s-head hawkmoth spotted a What a beauty! A death’s-head hawkmoth spotted at @sylvawoodschool @sylvafoundation
A Window into the Chilterns #trees #landscape #chi A Window into the Chilterns #trees #landscape #chilterns #nature
Enjoying the botanic garden @unica_ortobotanicohbk Enjoying the botanic garden @unica_ortobotanicohbk in Sardinia, Italy #trees #flowers #botany #italy #sardinia
Waiting to hear the whistling of a tango under thi Waiting to hear the whistling of a tango under this jacaranda tree in Sardinia (Jacaranda mimosifolia)
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Silvology & Tree Science News

Silvology is the biological science of studying forests, incorporating the understanding of natural forest ecosystems, and the effects and development of silvicultural practices.

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Recent Science Posts

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Forests of Scotland 2024 Calendar
Forests of Scotland 2024 calendar by Gabriel Hemery
Forests of Scotland 2024 calendar by Gabriel Hemery

The Forests of Scotland 2024 calendar features 13 images selected from The Forest Guide Scotland printed in large (A3) landscape format in glorious colour. Calendar dates are minimalist to allow the image to shine in your home or office.

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