The anonymized, raw results of the 2021 OSMF community survey have been posted here in .ods format spreadsheets. There are two spreadsheets, one containing anonymized raw data, and the other containing summary statistics calculated from the raw data before anonymization. I believe I have caught all errors made in the initial trials of calculating summary statistics (I had to brush up some long-dormant spreadsheet skills), but will appreciate being notified if anybody reading this notices anomalies or errors in the statistics.

I am continuing to analyze the raw data, and if there are specific requests for cross-sectional analysis not already presented in the summary statistics spreadsheet, please let me know, and I’ll try to fit them into my schedule.

We are working on normalization of the data against mapping activity by country. Since 84% of respondents identified themselves as mappers, this should help us to weight (normalize) the responses by geography. Initial examination of normalization trials revealed, however, that the differences between raw results and normalized results do not appear large. We are therefore proceeding with release of the raw data.

Please feel free to amplify this message via social media and other communications channels and in languages other than English. Many thanks in advance for your help.

My January 2021 in OSM

… See full entry

In my last post I looked at survey responses by country and their correlation with mappers eligible for a fee waver as an active contributor.

I wanted to look at the correlation with OSM.org views. I already had a full day’s worth of logs on tile.openstreetmap.org accesses, so I filtered them for requests from www.openstreetmap.org and got a per-country count. This is from December 29th, 2020. Ideally it would be from a complete week, and not a holiday, but this is the data I had downloaded.

The big outlier is Italy. It has more visits than I would expect, so I wonder if the holiday had an influence. Like before, the US is overrepresented in the results, Russia and Poland are underrepresented, and Germany is about average.

Like before, I made a graph of the smaller countries.

… See full entry

My latest blog has been published on the YouthMappers blogging site. The blog is all about my mapping experience of 2020. All of you are requested to read my blog. Find the full blog

A geoglyph 150m x 150m appears to be of head of a smiling person, facing west, seems entertained by a parakeet on its hand. The figure is drawn showing two squinting eyes while watching the activities of a calm and relaxed parakeet facing east.. The etching on facial features includes a small stubby nose and a massive jawline. Except for the figures fingers, there is little resolution to suggest a neck or other portions of its body. What appears worn by the figure is partly traced Inca style wool cap with ear flaps. It seems the artist in creating this object in conjunction with the natural features of the terrain. To further express the subject, the artist performed some minimal modifications to the natural surfaces of the rock to create the figure. .

Note that the top of the head of this object falls into a valley, making it appear upside-down or very difficult to see from the ground.

15°17′15″S, 74°30′16″W -15.2874471, -74.5043227 Acarí, Province of Caravelí, Arequipa, Peru

A geoglyph representing a skeleton (75m length x 50m wide) depicts human bones, face up, with one outstretched arm pointing north. The body lays in an east (head) to west (feet) orientation.
The geoglyph is well reflected in terms of anatomy of skull, spine, ribs, hip, legs and arms with hands. There is a bit of proportional issues with hands, ribs and arms, but the characterization is well defined. The skull is turned sideways, facing south.
Thigh bones measure a good 1m thick. Note that there is a 30m difference in height between the hand pointing north and the foot pointing west. .

15°17′17″S, 74°30′33″W -15.2880744, -74.5092060 Acarí, Province of Caravelí, Arequipa, Peru

Above image: Exploring the island with my partner.

My favorite camping spot near Seattle is Blake Island State park because I can literally walk from my apartment to the ferry which drops me off at the campground without any need for a car!

The Blake Island trails are not fully mapped on Open Street Map so I guess that’s my job now? Here we go!

… See full entry

Geoglyph of the God of Death, named Supay with an elaborate headpiece with horns. Over 60m wide x 250m long (counting the suggested drawing of his body/robe) he is wearing a pointed beard. He is faces forward with his whole torso tilted slightly oriented north to south. The shape of his head appears triangular with his body hunched below the neckline, wearing a high collar, wrapped in a textured robe holding a smaller animal in his right hand, and carrying a burning skull on a stick on his left hand.
It is unknown the purpose of the geoglyph or that it has some other meanings.

15°17′16″S, 74°30′33″W -15.2878229, -74.5090943 Acarí, Province of Caravelí, Arequipa, Peru

A Geoglyph of a Moray Eel attacking from his cave 50m x 70m a Sucker Fish 50m x 50, is oriented southwest to northeast. The Eel appears to attack the fish with distinctive jaws and mouth and partly leaves leaves his cave to do so. The Sucker Fish, appears to swim unnoticed that it is being attacked. The eels cave is a suggested as a reef with a hole of where the eel resides, but it is also difficult to determine if this reef has other details showing coral or other nearby fish. This geoglyph is part of a larger group of shapes sharing the same artwork themes.

This suggested image, brings up questions that possibly this culture had skin diving as a form of fishing.

15°17′18″S, 74°30′35″W -15.2883668, -74.5096664 Acarí, Province of Caravelí, Arequipa, Peru

Less than 5m wide x 5m high, this shaped skull scratched as a geoglyph has two eyes and a disproportioned jaw while oriented north to south. It shares the terrain façade with other geoglyphs identified in this area.

15°17′16″S, 74°30′35″W -15.2877800, -74.5097812 Acarí, Province of Caravelí, Arequipa, Peru

This 30m wide x 50m long geoglyph is an image that suggests a screaming, calling or yelling head wearing face makeup. Stark eyes faces right at viewer. This head is oriented north to south.

The artwork directed is of a head, that appears like it is calling or shouting. Stark eyes this geoglyph is quite large, almost completely hidden but fully exposed on a steep bluff that drops as much as 10m.

This geoglyph is located on a curve, right above a dirt road, possibly making it very hard to see. Approximately 300m to the north and a secondary group of geoglyphs exist as well.

15°18′12″S, 74°32′51″W -15.3032945, -74.5476281 Acarí, Province of Caravelí, Arequipa, Peru.

An impression of north to south pointed head geoglyph 25m wide by 150m long is to the adjacent left of a geoglyph head 25m wide x 20m long. The geoglyphs appear close enough to touch each other. They are located on a at the same side of a 40m steep pitched hill.

The first is a pointy head geoglyph, shaped as a carrot, has distinctive two eyes and a mouth. There is little or no indication of a nose. There seems seem to be no indication of neck or body or extremities for this figure. The second is a smaller head has what appears to be two wide looking bugeyes, flat nose and a wide mouth and stops at the lower portion of its neck. There is no ears. The head was drawn just to the right of the carrot shaped head. The details are sketchy but the facial features appear intentional.

To the right of the smaller head are two geoglyph lines that may converge with another geoglyph line. While likely, it there is little confirmation from the satellite images to be certain.

when in Puerto Rico

osm.wiki/Puerto_Rico_Imagery

http://{switch:a,b,c}.tile.openstreetmap.us/usgs_large_scale/{zoom}/{x}/{y}.jpg

(Versión en español)

As a follow-up of my past month’s post about Joining the Open Mapping Movement, I want to share with everyone my initial plan on how I’m going to bring value to this space.

Why

… See full entry

Several geoglyphs totals an area of 40m x 40m with a King figure 15m wide x 25m long and five different figures each averaging 5m x 5m. The orientation of these figures are north to south and from top to bottom changes elevation 10m. The image suggests a King figure centered and directly over his five subjects. Each of the faces have a lot of expression, though detail is very rough and will take some better backgrounds to fully understand.
The King has a wide faced head and the image suggests that his arms are folded in front of him. He is also suggested to have been wearing a crown. The five figures below him are as follows along with their descriptions. There are visible etchings that suggest bodies and possibly more faces, but they are unrecognizable. Therefore, unless there are more clear images, there is a degree of clarity in whether or not these five (or more) faces have bodies or necks. There is an attempt to show these figures.

Oval head (possible face to its right, possible shoulders and neck)
Triangle head (possible body below its head) Skull head (possible body below its head) Heart Shaped head (possible body below its head) Round face head (possible body below its head)

14°53′5″S, 74°52′59″W -14.8848281, -74.8831564 Vista Alegre, Province of Nasca, Ica, Peru

Etched into a hillside is what appears to be a graphic of a 75m wide x 75m long geoglyph a joyous man, walking wearing a loose fitting v-neck alpaca pancho. He is pointing in front of him and behind him. He seems to be wearing a cap and a scarf. You can see two hands, two feet and facing the viewer and climbing the mountain. His oriented north to south and where he is etched changes elevation of a distance of around 15m;

14°53′19″S, 74°53′46″W -14.8885638, -74.8960171 Vista Alegre, Province of Nasca, Ica, Peru

An etched geoglyph of the animal called a Capyvara (100m long x 80m wide) in an orientation of east facing west looks as if its eating from the ground. The animal, drawn anatomically correct has the side view unmistakably of the animal. From side view, two legs, head, one eye and body appears. The etching shows the animal while on all four legs, with its head to the ground, feeding. It is unclear what the animal is eating. There also seems little about what might be the reason for the artwork.

14°53′6″S, 74°53′25″W -14.8849783, -74.8901820 Vista Alegre, Province of Nasca, Ica, Peru

The board has started releasing results from their 2021 survey. I’ve done some analysis on the response rates by country.

There’s lots of data for activity on OSM by country, but for this I took the numbers from joost for how many “active contributors” there are according to the contributor fee waver criteria.

For the larger countries, Russia is the most underrepresented country. This is not surprising, as they are underrepresented in other venues like the OSMF membership.

The US and UK are both slightly overrepresented in the survey, but less so than I would have expected based on other surveys and OSMF membership.

The smaller countries are all crowded, so I did a graph of just them.

… See full entry

Multiple geoglyphs of less than 3m-5m can be seen nearby a huge 40m x 40m geoglyph of a cross with a 10m long horizontal line under it. From satellite it is impossible to read what they are clearly manmade shapes. This moderate slopes uphill from west to east and changes about 10m of elevation in 40m of distance. It seems possible that the large cross geoglyph is designed to be visible from one vantage points or other nearby distances.

14°53′14″S, 74°53′44″W -14.8872554, -74.8955639 Vista Alegre, Province of Nasca, Ica, Peru

Geoglyphs ranging from 200m x 200m to 200m x 600m are of manmade continuous lines that when counting switchbacks easily stretch a distance of over 15000m. These linear geoglyphs lines average 1m in thickness, and also contain 180 degree switchbacks turns that might a single or double line. All the lines aim the similar direction, northeast to southwest and appear in three different sized groupings. The largest grouping has a smaller group within it. The three groups each with lines do not appear connected. Except for vantage points, every grouping of lines are etched in an entire area that is relatively flat.

The middle group, also the largest of the three switchback lines, have a semi-circular 10m diameter platform like geoglyph. This middle group also has what appears to be a ceremonial spot.

Each group of switchback lines have their own viewing/vantage point, where a small berm is provided. It is unclear what might be uses for these viewing/vantage points, but one might assume it is given importance. Each of the three viewing/vantage points all seem to be located northeast of the group of lines and all are approximately the same size. Coordinates are given to each and they are shown on the maps. It might be also worth noting the anything that was a hill may have been a vantage point, but the ones that were selected in coordinates seem to be the closest the the switchback lines.

No. 1 - Ancient Viewing Point -14.5995933, -75.3054811

No. 2. - Ancient Viewing Point -14.6026197, -75.3056850

No. 3 - Ancient Viewing Point -14.6080178, -75.3039053

14°36′21″S, 75°18′12″W -14.6058689, -75.3034485 Changuillo, Province of Nasca, Ica, Peru