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Posts Tagged ‘Global Mapper’

Running en Nantes

2016/09/13

Cada vez que corría por esta maravillosa ciudad, lo grababa con la aplicación Runkeeper, así que he superpuesto todas las ocasiones para ver dónde exactamente se concentran las rutas que más he usado y las zonas por las que he pasado más veces. Esto es lo mal de concentrar en la misma persona alguien al que le gusta correr, apuntar cosas, visualizarlas, analizarlas…

Creo que hacer tracking de rutas, tiempos, ritmos, etc, me ayuda a enfocar lo importante que es para mí la regularidad y la constancia. No es correr en sí lo que me gusta, que sí, sino demostrarme que soy capaz de hacer algo que me entretiene, me relaja, de forma periódica y con contadísimas excepciones (lo único que me deja en casa es una lesión o un cabreo).

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Y se ve claramente en rojo cuáles son esas zonas!!! He exportado las líneas a puntos y he creado un mapa de densidad en Global Mapper 17, al que he superpuesto un layer de Open Street Maps.

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Cómo echo de menos correr por el Loira, sus parques, sus puentes, sus riachuelos… ahora corro en Madrid y también me gusta mucho pero me trae muy buenos recuerdos puesto que fue allí donde empecé a hacerlo en serio.

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Bueno en serio quiero decir, a hacerlo siempre.

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Réalisation du carte de densité pour vérifier Localisation des colonnes aériennes de Nantes Métropole

2016/09/12

Localisation et caractéristiques des colonnes d’apport volontaire aériennes de Nantes Métropole utilisées pour la collecte des déchets.

  1. Outil de visualisation Global Mapper 17
  2. Format SHP
  3. champ: VOLUME

http://data.paysdelaloire.fr/donnees/detail/localisation-des-colonnes-aeriennes-de-nantes-metropole/

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Ces colonnes sont implantées sur l’ensemble du territoire et sont destinées à la collecte du verre et des emballages recyclables (papier, carton, plastique).

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C’est genial jouer un peu avec des données Open Data, j’espère que vous avez aimé.

Alberto
MSc SIG et remote sensing

DTM from SRTM? Let’s compare sources using RMSE (Root Mean Square Error) and a gaussian kernell density map

2014/10/29

I guess we all can make a DTM out of many sources but SRTM is one of the most common ones, right?. Then let’s learn from this very simple approach how close we are from the SRTM raw data.

  1. Selecting a not very big representative area to be able to handle it,
  2. exporting raster to polygon (from SRTM 3 arcsec/90m) dataset 1
  3. exporting raster to polygon 30m (our DTM dataset) dataset 2
  4. exporting to POIs 30m (our DTM dataset) dataset 2b
  5. Spatial join POIs dataset 2b vs dataset 1
  6. RMSE
  7. visualizing delta using a density map/gaussian kernell +appropriate symbolization

In yellow we see theres a full correspondence between SRTM and our DTM dataset and in blue there’s a ‘hole’ and in red there’s a ‘mountain’, this means it’s in here where the shift is more important.

This way we can highlight if sources are OK.

It’s simple but it works. How do you like it?. Please feel free to send some feedbak.
(Software used: ArcGIS 10.1, Global Mapper 13.2)

Cheers,
Alberto Concejal
MSc GIS, QC

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density maps parameters

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Spatial join between both DTM datasets

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Density map for highlighting differences between both datasets (ours and SRTM’s)

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RMSE. It’s not too big so there’s need to visualize to find potential bizarre spots

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bizarre DTM heights

Cool data. What is this?

2013/09/16

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What is this ‘cool data‘ all about?. When i got my degree in Geography (about 15 years ago) it didn’t make sense at all being interested in something like graphic design, photography, video and all this stuff… but not only interested in my leisure time but also for taking advantage of it, getting a life out of it. When, after three years of working in a plane while taking aerial pictures i got fed up with anything related to Geography (and working 24/7) and started working as a website designer it started making a bit of sense… Only five years later, having worked as multimedia photographer, graphic designer and technical salesman everything got aligned and made all the sense in the world… i wanted to come back to Geography but taking advantage of all this years of doing something else…

It was time to resign and comeback to the university to get a MSc (In Remote Sensing and GIS)… leave everything behind and planning my working life again. After finishing my master’s degree (well, actually they were two!) i received a call from South Africa. Are you Alberto?. Hell yes, I am!. We have just received your CV and we are interested in offering you a job dealing with something (i didnt know about) called ‘Geovisualization’. Again, what is this all about?. Well, its dulcifying, easying up all complex information and offering it in a new way, a much easier way to understand it… This is what i call COOL DATA.

Let’s imagine there’s something our customer doesn’t really understand and its kind of difficult to describe using words… There’s always a way for making it easier. Using Graphic design tools or Video software to recreate a workflow or explain something complex… even adding some music, why not???.

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Using Photoshop Macros and a few composition rules we can convert a tricky template in something we, our team and our customer will understand completely.  What about Global Mapper scripts for quick conversions between formats?.

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What about including some statistics?

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and Spatial analysis?.

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And 3D?

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Maybe some video?

Is this clear enough?. No?.
Let me explain it to you in English, French or Spanish.

Now, seriously, count on me in case of need of converting complex datasets into COOL DATA.
Please don’t hesitate to contact me.

Alberto Concejal
MSc GIS and Remote Sensing
albertoconcejal (at) gmail.com

Data acquisition: How do I know if this river is been well acquired?

2010/06/14

I’ve already entered my river but my imagery was in 2D so… was it well acquired?…  First of all, I import my shape (shp) file into Global Mapper (what a great sofware!) and export my vector file as a KML.

Import my river.kml file into my brand new Google Earth 5.2 or just double-click it in his location… easyest impossible!.

Select it and use ‘show elevation profile’,  a very useful new tool for these purposes…

And that’s it, constant altitude, almost perfect!.

Hope you have considered it interesting:-)

Alberto

WMS in Google Earth.

2009/08/04

I have thought there is something very interesting maybe you guys have never tried… using your Google Earth sesssion not just for navigating, finding your house or the place you are going on holidays to… If you use the WMS protocol to show your map over your 3D scenario you are going to add a little bit more of interest to your Google Earth… Lets add a Corine Land Cover Map over my 3D map…but, What is WMS???, What is Corine Land Cover???. Im not even trying to tell you by myself, I am opeining my WIKIPEDIA to tell you, hehe…

WMS

A Web Map Service (WMS) is a standard protocol for serving georeferenced map images over the Internet that are generated by a map server using data from a GIS database. The specification was developed and first published by the Open Geospatial Consortium in 1999.

CORINE LAND COVER

CORINE (Coordination of information on the environment) is a European programme initiated in 1985 by the European Commission, aimed at gathering information relating to the environment on certain priority topics for the European Union (air, water, soil, land cover, coastal erosion, biotopes, etc.). Since 1994, the European Environment Agency (EEA) integrated CORINE in its work programme. EEA is responsible for providing objective, timely and targeted information on Europe’s environment.

This is the Official Corine Land Cover key map.

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This is the area I would like to know more about, Chiclana de la Frontera in Cádiz, SW of Spain.

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This is once we get connected via WMS to the place where you can get those maps (http://www.idee.es/wms/IGN-Corine/IGN-Corine?). By the way you can search on the internet to get more maps… you just have to go to google and search for ‘wms maps’ and you’ll be able to find them. This is a Corine Land Cover Map with information from year 1990.

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This is a Corine Land Cover Map with information from year 2000.

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This is what we find after comparing both images… I have compared them using Photoshop CSX but you can go further and use global Mapper, ER Mapper or ArcGIS… As you can see, those areas highlighed are the areas with changes (very small in this case)…

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More geographic post to come very soon!!!

Alberto

Modelado 3D. Escenarios subterráneos en red de alcantarillado de varias ciudades españolas

2009/07/27

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Definición de flujos de trabajo en 3D

2009/07/27

Protocolos de creación de escenarios en 3D, tratamiento de imágenes satélite, creación de modelos digitales de elevaciones -MDE- y del terreno -MDT- además de modelos en 3D. Google Sketchup, Google Earth, Global Mapper.

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