Advertisements

Posts Tagged ‘alberto concejal’

Solar + Shadows analysis on Rue Massillon, Nantes (France)

2013/04/04

This is the beautiful building in from of my house in Nantes… Let’s model it first using Sketchup. Also i have used a non standard style only for visualization purposes…

rue_massillon_02

If we have the North behind us this means we are going to have a lot of light… but so far we are just guessing…

rue_massillon_01

Now we know if for sure. Take a look at the results by M. Capeluto’s Solar Analysis.

rue_massillon_03

If we face South we notice there’s a lot of sun in the other side of the building (every line is a summarized path during a month, being the higher the closer to the summer solstice)

Please take a look at the video prepared by Tomasz Janiak, the developer of the tool.

Hope you guys find it interesting. Please let me know your thoughts.

Alberto

Advertisements

Shadow analysis en Puerta de Arganda, Madrid.

2013/04/03

Hoy publico en español puesto que los datos son en español y yo soy español:-) but if you guys have any doubt dont hesitate to ask… even if you have to use your french i will be around to answer you back… quand même !!!.

La idea era hacer un estudio de sombras de para mi propio uso pero extrapolable al uso para inmoliliarias. El modelado es como siempre usando sketchup y el plugin gracias a Tomasz Janiak:

http://tomaszjaniak.wordpress.com/category/plugin/

Como ejemplo elegí mi propia casa en una urbanización al sur este de Madrid, en Vicálvaro concretamente. Como veis, cuanto más mire al sur más posibilidades hay de que de el sol y por la misma regla de tres, una exposición norte conlleva menos horas de insolación (lo que no quiere decir que no haya sol, claro… y menos en Madrid). Aquí la urbanización a estudio.

shadow_analysis_puerta_arganda02

La propia configuración de la urbanización va a permitir que sea más o menos complicado que entre el sol por tu ventana, lo que quiero decir es que no es lo mismo una casa cuadrada independiente de dos pisos que una concatenación de bloques puesto que entre ellos también van a generar sombra, incluso obviamente hay que contar sobre todo en medio de la ciudad con edificios cercanos que puedan proyecta sombra sobre el nuestro y por supuesto otros artefactos tipo antenas o postes así como árboles. En este caso concreto esto no se ha tenido en cuenta para simplificar el análisis.

Por otro lado estudiamos el número de horas que da la sombra con cierta orientación (aproximadamente 245º)

shadow_analysis_puerta_arganda03

Y otra con aproximadamente 46º…

shadow_analysis_puerta_arganda01

También incorporo el uso de plugin Solar Analysis de Mr Capeluto que se ha tratado en un post anterior, lo que ayudará a tener una idea más clara de por dónde va el sol… como veis el norte está indicado y muestra cómo sale por el Este y se pone por el Oeste… este es un tema interesante a comprender bien, echad un vistazo a esta web de Microsiervos, por cierto interesante siempre:

http://www.microsiervos.com/archivo/curiosidades/por-donde-sale-realmente-el-sol.html

shadow_analysis_puerta_arganda_02

http://gcapeluto.technion.ac.il/SunTools/STdownload.html

Espero que os haya parecido interesante, y si queréis saber algo más ya sabéis: Preguntad!!

@old_gisman (twitter)

On va nous déménager alors… Analyse solaire !

2013/04/02

Ma copine et moi on va nous déménager très bientôt alors il faut faire unE analyse solaire. Nantes, la ville ou on habite est connue dans le monde entier pour ses niveaux de pluie, n’importe que CE soit été, printemps… meme si France Météo a dit qu’il va faire BEAU… A Nantes ça ne marche pas comme ça. Il faut maximiser l’exposition pour garantir un montant minimum de lumière du soleil pendant l’année mais… comment faire?.

En rouge chez nous… on a pas encore trouvé notre nouvel appartement alors je vais faire l’analyse ici…

sun_tools_01

J’utilise Sketch-up pour modeler en 3D le bâtiment et Sun tools developé par Guedi Capeluto (Faculty of Architecture and Town Planning. Technion Israel Institute of Technology).

On peut voir quel parcour et a quel heure le soleil passe par là.  Chaque mois un peu plus haute (month 1, month 2, month 3…)

sun_tools_02

C’est très facile a comprendre et va beaucoup nous aider a trouver le trésor le plus important dans cette partie de la France: le SOLEIL !!!!!

http://gcapeluto.technion.ac.il/SunTools/STdownload.html

Plug-in Features:

  • SunPATH: visualization (month and year)
  • SunPOS: Sun Position for a date and time
  • SunVIEW: Axonometric views from the Sun
  • SunPENETRATION: Analyze Sun Penetration/Access in any specific analysis point.

J’espère que ça vous plait.

Alberto

P.S. Ouais, je sais, mon français c’est pas parfait mais j’essaie alors vous pouvez m’envoyer vôtres doutes en anglais et espagnol sans problème;-)

ViewTec’s State-of-the-art 3D visualization

2010/09/14

Good news!!!! They’ve probably released this Geovisualization Engine long time ago (It used to be an ‘in-house’ software) but I have just realized. I worked with this state-of-the-art TerrainView 3D software for six months while I was working as a GIS Specialist in Cape Town (South Africa)… What does this software has that no one of other softwares I know have????. Rain, snow, clouds, wind… Athmosferic conditions!!!!  A very reliable package… I have just uploaded a video rendered directly from a pre-recorded flight path… I will try to make my own while I work with this personal license key they have provided me for one month… Here it is!!. Hope you like it mates!.

http://www.viewtec.net/

Products

ViewTec provides state-of-the-art interactive 3D visualization products andreal-time 3D Earth GIS.

TerrainView™

TerrainView™ is the free entry visualization product of ViewTec. TerrainView™ is an easy to use viewing tool and 3d editor capable of displaying the most popular 3d formats. It offers walk-through capabilities in real-time.TerrainView Extensions

Upgrade the free TerrainView product online to the different professional extensions:

TerrainView-Globe™

TerrainView-Globe™ extends TerrainView with unlimited GIS, multilayered elevation and image data import based on Earth and offers ultra-fast and high resolution rendering for GIS and simulation users.

TerrainView-RemoteControl™

The extension TerrainView-Remote Control™ offers an API to remotely manipulate points of interest and 3D objects of a 3D scene in real-time.

TerrainView-CMAX™

The extension TerrainView-CMAX™ consists in a high-end system for seamless multi-channel, multi-projections and visualizations on multiple screens and walls.

TerrainView-Video™.

TerrainView-Video™ is the extension to produce videos in a resolution higher than 640×480 e.g. PAL, NTSC and HDTV.

Smarter Streets: Case Studies for Cities and Utilities – Learn How the City of Baltimore and Washington Gas Reduced Costs

2010/08/30
In the City of Baltimore, the decades-old infrastructure consists of 2,000 miles of roads, 300 bridges and culverts, 7,600 miles of water pipes, storm water drains and wastewater lines, and 3.7 million feet of conduit. Washington Gas serves more than one million residential, commercial and industrial customers throughout the Washington, DC metropolitan area. What they have in common are significant challenges working in the Right of Way.
Join us for a complimentary and informative webinar on Wednesday, September 15, and hear two case studies on new technology deployed by utility companies and government agencies to manage real-time, coordinated planning of repairs to aging infrastructure.
This web-based, centralized, map-driven technology provides for the timely exchange and coordination of construction and maintenance projects online while:
• Reducing construction and paving costs
• Providing better information with which to make operational decisions
• Avoiding the headaches of poorly timed projects and the resulting cost overruns
• Solving the problem of paving streets shortly before a series of planned utility cuts
REGISTER NOW

In the City of Baltimore, the decades-old infrastructure consists of 2,000 miles of roads, 300 bridges and culverts, 7,600 miles of water pipes, storm water drains and wastewater lines, and 3.7 million feet of conduit. Washington Gas serves more than one million residential, commercial and industrial customers throughout the Washington, DC metropolitan area. What they have in common are significant challenges working in the Right of Way.
Join us for a complimentary and informative webinar on Wednesday, September 15, and hear two case studies on new technology deployed by utility companies and government agencies to manage real-time, coordinated planning of repairs to aging infrastructure.
This web-based, centralized, map-driven technology provides for the timely exchange and coordination of construction and maintenance projects online while:
• Reducing construction and paving costs• Providing better information with which to make operational decisions• Avoiding the headaches of poorly timed projects and the resulting cost overruns• Solving the problem of paving streets shortly before a series of planned utility cuts

REGISTER NOW

Visualizing LAS LIDAR data with sketch-up

2010/07/02

While trying to figure out the way to get a 3D model from raw Lidar data, I first opened my LAS file in Global Mapper, exported it to DXF, imported then into Sketch-up and after recording a few scenes, I saved the animation… this is it!.

Alberto

Using Excel to calculate the RMSE for LiDAR vertical ground control points

2010/06/30

(source: http://dominoc925.blogspot.com/)

The height accuracy of the collected LiDAR data can be verified by comparing with independently surveyed ground control points on hard, flat, open surfaces. It is essentially just calculating the height differences for all the control points and then determining the height root mean squared error (RMSE) or differences. Most LiDAR processing software have the reporting function built-in. However, plain Microsoft Excel can also do the job (except for extracting the elevation from the LiDAR data).

Assuming that you are able to calculate the height differences for all the control points and place in a spreadsheet as shown in the figure below. I have a column of delta Z values in column A.

Then to calculate the RMS value for the elevation differences, I can do the following.

  1. In a cell, type in the formula:= SQRT(SUMSQ(A2:A18)/COUNTA(A2:A18))where A2:A18 are the values from cell A2 to A18 in the spreadsheet. Simply replace these with the actual locations on your spreadsheet.
  2. Press RETURN.
    The RMSE value is calculated.

(source: http://dominoc925.blogspot.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

The SketchUp 3D API: Working with 3D geospatial data

2010/06/14

I hereby post this video by Matt Lowrie (Google). hope it’s interesting for you guys.

Alberto

GIS+Architectural scenaries. Awesome!

2010/06/12

Even from scratch or from dgn/dxf vectorial format’s contour lines you create your own scenario.

Then import your model previously created using Sketch-up (this time i used google’s 3d warehouse, thank you Dilbert).

Stamp your house using sketch-up sandbox tools.

Then fur your scenario as if it was grass…

A little of photoshop like clouds and thats it!

Alberto Concejal
geographer, 3d designer & 3D GIS technician
albertoconcejal [at] gmail.com