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<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Hi Tim,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Thanks again for your response !<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">It fit perfectly !<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Best <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">Ben<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>De :</b> Tim Salabim <tim.appelhans@gmail.com> <br>
<b>Envoyé :</b> mardi 9 juillet 2019 16:25<br>
<b>À :</b> Benjamin Pauget <benjamin.pauget@tesora.fr>; r-sig-geo <r-sig-geo@r-project.org><br>
<b>Objet :</b> Re: [R-sig-Geo] geoJSON and leaflet<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Benjamin,<o:p></o:p></p>
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<p class="MsoNormal">please respond to the list as well. Other people may have similar issues and this way we can find the solutions online.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you want to extract the data along with the geometries, here's how you could do it:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">library(leaflet)<br>
library(jsonlite)<br>
library(sf)<br>
<br>
url <- "<a href="http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10">http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10</a>"<br>
<br>
geojson <- jsonlite::fromJSON(url)<br>
<br>
# convert coordinate arrays to matrices<br>
geom = lapply(geojson$data$geom$coordinates, matrix, ncol = 2)<br>
# create multipolygon from coordinate matrices<br>
geom = lapply(geom, function(i) st_polygon(list(i)))<br>
# overwrite the geom column of data in geojson<br>
geojson$data$geom = st_sfc(geom, crs = 4326)<br>
# exract data from geojson and turn into an sf object<br>
dat = st_as_sf(geojson$data)<br>
<br>
leaflet() %>%<br>
addTiles()%>%<br>
setView(lng = 4.854899, lat = 45.763079, zoom = 14) %>%<br>
addMarkers(lng = 4.872536, lat = 45.758321)%>%<br>
addPolygons(data = dat, popup = ~nom)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This way, as you can see, you can use the tilde (~) notation to include popups referring to a column of the data.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I don't think that what you get using RSONIO is any closer to a valid geojson.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best<o:p></o:p></p>
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<p class="MsoNormal">Tim<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Jul 9, 2019 at 3:28 PM Benjamin Pauget <<a href="mailto:benjamin.pauget@tesora.fr">benjamin.pauget@tesora.fr</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Dear Tim,
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Tanks you soooo much for your response !</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I am a beginner and working with geospatial is still unclear.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I have tried to open my json file with “from_JSON” and I have another format of my data :</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">url <- "<a href="http://www.georisques.gouv.fr/api/v1/sis?rayon=5000&latlon=4.854899%2C%2045.763079&page=1&page_size=10" target="_blank">http://www.georisques.gouv.fr/api/v1/sis?rayon=5000&latlon=4.854899%2C%2045.763079&page=1&page_size=10</a>"</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">geojson4 <- RJSONIO::fromJSON(url)
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Do you think this format is more relevant and will allow to display the pop’up info ?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Thank you again for your code (I just pass the two last day on trying to display the polygons) !</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Best regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> Ben</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>De :</b> Tim Salabim <<a href="mailto:tim.appelhans@gmail.com" target="_blank">tim.appelhans@gmail.com</a>>
<br>
<b>Envoyé :</b> mardi 9 juillet 2019 15:14<br>
<b>À :</b> Benjamin Pauget <<a href="mailto:benjamin.pauget@tesora.fr" target="_blank">benjamin.pauget@tesora.fr</a>><br>
<b>Cc :</b> <a href="mailto:r-sig-geo@r-project.org" target="_blank">r-sig-geo@r-project.org</a><br>
<b>Objet :</b> Re: [R-sig-Geo] geoJSON and leaflet<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Benjamin,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">What you get back from the jsonlite::fromJSON() call is a simplified list with the data (including the geometry information) as a data frame in one of the list slots. GeoJson is
usually a character string. Therefore, if you open your map in the browser and open the console (Ctrl + i) you will see the error message: "Invalid GeoJson object".
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am no expert on geojson structure, but it seems that the data that you request is not in standard format. I tried a few different ways of parsing the data to a valid GeoJson string
but did not have success. Maybe someone else with more insight has some helpful ideas how to achieve this.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">However, I found a workaround to get the polygons shown on the map using library(sf) - see code below. Note, this only visualises the geometry information only, so direct popup
queries via "~" are not possible.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">library(leaflet)<br>
library(jsonlite)<br>
library(sf)<br>
<br>
url <- "<a href="http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10" target="_blank">http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10</a>"<br>
<br>
geojson <- jsonlite::fromJSON(url)<br>
<br>
# convert coordinate arrays to matrices<br>
geom = lapply(geojson$data$geom$coordinates, matrix, ncol = 2)<br>
# create multipolygon from coordinate matrices<br>
geom = st_cast(st_polygon(geom), "MULTIPOLYGON")<br>
<br>
leaflet() %>%<br>
addTiles()%>%<br>
setView(lng = 4.854899, lat = 45.763079, zoom = 14) %>%<br>
addMarkers(lng = 4.872536, lat = 45.758321)%>%<br>
addPolygons(data = geom)<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">HTH,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Tim<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, Jul 9, 2019 at 1:49 PM Benjamin Pauget <<a href="mailto:benjamin.pauget@tesora.fr" target="_blank">benjamin.pauget@tesora.fr</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I’m writting because I have some trouble with a geoJSON file and a leaflet.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I’m trying to display polygon on a leaflet map, but nothing append
</span><span lang="EN-US" style="font-family:"Segoe UI Emoji",sans-serif">☹</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I have no error message.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Do you have some advice/ideas?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Best regards</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Here is my code :</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">library(leaflet)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">library(jsonlite)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">url <- "<a href="http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10" target="_blank">http://www.georisques.gouv.fr/api/v1/sis?rayon=1000&latlon=4.854899%2C%2045.763079&page=1&page_size=10</a>"</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">geojson <- jsonlite::fromJSON(url)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">leaflet() %>%
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> addTiles()%>%</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> setView(lng = 4.854899, lat = 45.763079, zoom = 14) %>%</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> addMarkers(lng = 4.872536, lat = 45.758321)%>%</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> addGeoJSON(geojson) # doesn’t work by using geojson$data or geojson$data$geom</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:9.0pt;font-family:"Tahoma",sans-serif;color:#003B6A">Benjamin PAUGET</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.0pt;font-family:"Tahoma",sans-serif;color:#003B6A">Responsable R&D</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:2.0pt;font-family:"Tahoma",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif">+33 (0)1 81 94 13 70</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif">+33 (0)6 47 01 85 92</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif">Le Visium</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif">22 Av Aristide Briand</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif">94110 ARCUEIL</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt"><a href="https://tesora.fr/" target="_blank"><span style="font-family:"Tahoma",sans-serif">https://tesora.fr/</span></a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Tahoma",sans-serif"><a href="https://www.linkedin.com/company/tesora-france" target="_blank">Linkedin</a></span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">_______________________________________________<br>
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<a href="https://stat.ethz.ch/mailman/listinfo/r-sig-geo" target="_blank">https://stat.ethz.ch/mailman/listinfo/r-sig-geo</a><o:p></o:p></p>
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