{"id":193,"date":"2019-08-19T14:04:50","date_gmt":"2019-08-19T11:04:50","guid":{"rendered":"https:\/\/ramanihuria.org\/?page_id=193"},"modified":"2019-08-23T12:24:16","modified_gmt":"2019-08-23T09:24:16","slug":"mapping","status":"publish","type":"page","link":"https:\/\/ramanihuria.org\/en\/mapping\/","title":{"rendered":"Mapping"},"content":{"rendered":"\n
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Methods<\/h1>\n\n\n\n

Mapping<\/a>
 Digitizing<\/a>
 Modelling Risk<\/a>
 Sharing<\/a><\/p>\n<\/div>\n\n\n\n

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More often than not, maps are developed remotely by cartographers with great knowledge in their field, but no physical experience within the field that they are mapping. This results in inaccurate and insufficient data. For reference, see the two conflicting maps of one location in Dar es Salaam pictured to the right.
\n<\/p>\n\n\n\n

Ramani Huria does it differently. We train local university students and community\n members how to effectively create sophisticated maps of the city within\n which they live \u2013 maps with more than enough detail to serve as guides for all realms of development, with a particular focus on improving flood resilience.<\/p>\n<\/div>\n\n\n\n

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untitled<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Data Collection<\/h2>\n\n\n\n

The first goal of Ramani Huria is to \nequip community members with the skills required to conduct mapping. In \norder to do so, we begin by educating project participants about open \nsource data collection tools; OpenMapKit and OpenDataKit. <\/p>\n\n\n\n

OpenMapKit and OpenDataKit are \nintuitive phone applications that are equipped with imagery and forms \nfor direct data collection while in the field. Equipped with a \nsmartphone app and internet scratchcards, and supported by the Ramani \nHuria team, community members and Wajumbe (community leaders) are able \nto collect data at a hyperlocal level using these digital surveys. The \ndata they collect and infrastructural features that they tag are \ncontributing to the most detailed map to ever be created of Dar es \nSalaam.<\/p>\n\n\n\n

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Aerial Imagery<\/h2>\n\n\n\n

Before Ramani Huria \u2013 the aerial \nphotography for mapping in Dar es Salaam was dependant on minimal to no \ncloud cover, or alternatively was of low satellite quality.<\/p>\n\n\n\n

To combat \nthis, and to ensure the highest quality of imagery for the community \nmappers, we employ drones in collaboration with Drone Adventures and the\n Commission for Science and Technology COSTECH. The difference in detail\n enabled by these tools is astounding. For reference, see this \ncomparison between a map produced with and without the new aerial \nimagery.<\/p>\n\n\n\n

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Before<\/h3>\n<\/div>\n\n\n\n
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After<\/h3>\n<\/div>\n<\/div>\n\n\n\n
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Drainage Mapping<\/h2>\n\n\n\n
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The Ramani Huria project has not \nstopped at mapping roads and buildings. Going even further to help \nmappers create richer and more detailed maps to use for flood prevention\n initiatives, the Ramani Huria team have conducted drainage mapping of \nthe city.  <\/p>\n\n\n\n

The drainage system in Dar es Salaam \nis enormous and complex, with hundreds of thousands of drains, often \nalongside roads, ranging from enormous 3-metre-deep concrete channels \nalong highways to 5-cm-deep hand-dug ditches draining individual home \nsites. To help reduce flooding, drainage measurements and observations \nwere taken to help identify problem spots where drains needed repair, \nredesign, or cleaning. <\/p>\n\n\n\n

As of January 2018,we have completed \nthe field mapping, quality checks, and data cleaning for the drainage \nsystems in twelve wards of Dar es Salaam. These twelve wards have all \nbeen quality checked using the Deltares Hydro \u2013 OSM tool (https:\/\/github.com\/openearth\/hydro-osm<\/a>),\n a toolbox to convert OpenStreetMap data into data layers that can be \nreadily used for hydrological and hydraulic modelling and generation of a\n topologically correct 1D network.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Methods Mapping Digitizing Modelling Risk Sharing More often than not, maps are developed remotely by cartographers with great knowledge in their field, but no physical experience within the field that they are mapping. This results in inaccurate and insufficient data. For reference, see the two conflicting maps of one location in Dar es Salaam pictured […]<\/p>\n","protected":false},"author":139103867,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/fullwidth.php","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-193","page","type-page","status-publish","hentry"],"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/Pb67dp-37","amp_enabled":false,"_links":{"self":[{"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/pages\/193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/users\/139103867"}],"replies":[{"embeddable":true,"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/comments?post=193"}],"version-history":[{"count":20,"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/pages\/193\/revisions"}],"predecessor-version":[{"id":371,"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/pages\/193\/revisions\/371"}],"wp:attachment":[{"href":"https:\/\/ramanihuria.org\/en\/wp-json\/wp\/v2\/media?parent=193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}