Kiblat Masjid di Riau yang masih banyak melenceng [Eps: Masjid Bat Inf 312]

Yang paling parah ternyata ada di Batalion Infanteri 312, padahal masjidnya ramai dikunjungi musafir lintas PKU-PDG. Terlihat di Google Earth masjid selama ini malah mengarah jauh ke Afrika Selatan, bukannya ke Kaabah, Makkah, KSA. Ada yang tahu pengurus masjidnya? Kasihan selama ini masjid popular ini malah salah kiblat. Garis adalah kiblat seharusnya, sedangkan arah sholat selama ini menghadap jauh ke selatan (Barat Daya).

Posisi Masjid ada di Koordinat Militer 47N QA 2179 03 5956 (terlihat pada gambar di bawah. Gambar adalah citra satelit mata-mata DG tertanggal 9 April 2015

2018-04-25_16-42-20

Latitude: 0.325328°, Longitude: 100.993200°

Elevation Google Earth sepertinya sedang error, bukan 0m dari rerata-permukaan-laut, tapi sekitar 52meter dari MSL (sumber: SRTM)

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Tactical Pilotage Charts

barangkali ada yang ingin iseng convert beberapa peta TPC dari Univ Texas di Austin, jadiin ubin / tile, sehingga bisa menjadi basemap dari WebGIS (misalnya: leafletJS atau Google Maps API)? Saya bersedia mengajarkan caranya, tapi tolong serius kerjanya dan didokumentasikan … hehehehe … maksudnya biar yang lain juga bisa ngikutin …

btw, peta Meranti tahun 80’an ini sepertinya bagus juga … 

 

Making shaded relief from digital elevation models (DEMs) in QGIS: a British Columbia perspective

reblog-ed from Wandering Cartographer, sedikit tentang DEM, SRTM, EPSG, QGIS blending

The Wandering Cartographer

Who would not agree with Tom Patterson, creator of the fabulous shadedrelief.com website, when he said, “There is no more important component of a map than the shaded relief.”

But the topic of creating your own shaded relief from a DEM is rather complex, so I’ve made a few assumptions in this how-to. I’m assuming:

  • you know your way around QGIS (I am using QGIS 2.18 for this post)
  • you’re familiar with the idea of projections, and re-projecting raster data
  • you know that each projection/datum combination has an EPSG number, which is a convenient way to refer to it. For example
    • Lat/Long/WGS84 = 4326
    • UTM Zone 9N/WGS84 = 32609
    • BC Albers = 3005

If that’s the case, there are really only three things you need to know in order to made your own hillshades:  where to get the data, how to transform it, and what pitfalls to avoid.

Why…

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Jekyll, Leaflet, TurfJS Presentation

Sila dibaca slide dari Malcolm Meyer pada NorthEast Ohio GIS Symposium, 2016-08-25, tentang penggunaan LeafletJS (plus jQuery) + Leaflet Chroropleth plugin), TurfJS untuk JavaScript GIS, dan Jekyll untuk template HTMLnya, https://getbounds.com/blog/neohio-gis-2016-leaflet-jekyll-turfjs/ lalu download sample code nya di Github, https://github.com/ovrdc/neohio-gis-2016-leaflet-jekyll-turf

Six Steps to Get a GIS Internship During Undergrad

Pavise

Finding an internship in college can be very daunting and time consuming. It took me 7 months of active searching to get my GIS internship during my undergrad. Depending on your location, university, and personal network this search time could vary significantly. Below, I’ll give you clear and actionable steps that you can utilize during your search for an internship. It’s important to note that these steps build on each other. As you move on to later steps, I suggest you keep following the preceding ones as well.

1. Talk with your professor

Visit your professor during office hours and let them know you’re looking for a GIS internship. Your professor is probably the single most important person when it comes to getting a GIS internship for the following reasons:

  • They have a good grasp of your skills and abilities.
  • They are a part of a larger GIS network in…

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GIS Lecturer, in Bahasa (Indonesian)