Posts Tagged ‘nev’

Natural Earth Vector Preview: Cities

Tuesday, August 18th, 2009

We’re closing in on having the cities for Natural Earth Vector complete. The final compilation has been made (focusing on a universal coverage based on regional importance, even if the town has less than typical population). Dick Furno has headed up this data theme and is half way thru applying 8 scale ranks to the cities. Population estimates will be added in a final step by another contributor. Screenshots show quick plots of the GIS data. Color implies ranking.

California (below):

california

Alaska-Yukon (below):

alaska-yukon

Europe Biggest Cities (below):

europeless

Europe All Cities:

europemore

Beijing-Tokyo biggest cities (below):

beijing-tokyo

All Aboard For NACIS Sacramento in October!

Wednesday, August 12th, 2009

sacramentoThe program for the 2009 NACIS annual conference has been announced. The location this year is Sacramento, Calif., from Wednesday, October 7th to Saturday the 10th. I will be presenting Natural Earth Vector with Tom Patterson and crew at the Practical Cartography Day event before the main conference.

The North American Cartographic Information Society, founded in 1980, is an organization comprised of specialists from private, academic, and government organizations whose common interest lies in facilitating communication in the map information community.

Opening session speaker will be Michal Migurski, Stamen Design in San Francisco. Michal is Partner and Director of Technology Stamen, and maintains an active blog about mapping and design. Several Saturday field trips are available.

See the nation’s most spectacular scenery on the way to this year’s NACIS conference. Join Dennis McClendon and the rolling Geodweeb party train as it heads from Chicago to Sacramento. More info is available via the CartoTalk forum posting.

trainmap

Sudan’s Border Dispute Over Abyei. Do They Agree? Yes, No, and Sort Of (Economist)

Tuesday, August 11th, 2009

cma980[Editor's note: Update your 1st order admin maps! The long simmering feud between northern and southern Sudan was partially arbitrated by The Hague last month. The south will decide in a 2011 referendum the question of seceding from Sudan. Many observers see secession getting the thumbs up. The freshly shaped Abyei state will vote on joining or staying individually while all others in the south proper will vote en mass.]

Republished from The Economist.
Jul 30th 2009 | JUBA AND KHARTOUM

A ruling from The Hague pleases the north and vexes the south

OFFICIALS in Sudan’s government in Khartoum could hardly believe their luck when, on July 22nd, the Permanent Court of Arbitration in The Hague ruled on the fate of the disputed Abyei state, which sits astride the oil-soaked border between Arab northern Sudan and the ethnically African (and largely Christian) south Sudan. Surprisingly, the court reversed an earlier commission’s ruling and redrew Abyei’s borders, snipping out the lucrative Heglig and Bamboo oilfields (see map) and giving them to the north.

The ownership of these oilfields has soured relations between the north and south Sudanese ever since a peace accord was signed between them in 2005, ending a civil war that had raged on and off for nearly half a century at a cost of some 2m lives. So tense had the situation in Abyei become that last year much of its capital was burned to the ground in fighting between militias from the two sides. Now, however, the north seems to have got what it wanted by law rather than by force.

Continue reading at The Economist . . .

Using Live Paint to Build Polygons Out of Line Segments in Adobe Illustrator (Kelso)

Wednesday, August 5th, 2009

I remember spending hours in my introduction to computer cartography lab class at Humboldt State University “building polygons” in the Adobe Illustrator design software package. We started with state “lines” and, one by one, duplicated and joined them into polygons by painstakingly selecting matching endpoints and cursing the Illustrator error dialogs that kept coming up. Fast forward 5 software versions and 10 years and we can now accomplish the same workflow in seconds using the new “Live Paint” feature available in version CS2 and newer. Maybe this is old news, but it’s sure makes things easier on the Natural Earth Vector project!

Download native Illustrator CS3 file and follow along with sample linework.

Step 1: Start with lines for 1st order, country, and hydro coast, rivers on separate layers (like you’d normally layer your map file).

live_paint_step1

Step 2: Duplicate all related lines onto one “building” layer (the next step would group originals if you don’t do here).

live_paint_step2

Step 3: Select all those duplicated “building” lines (interior state boundaries, exterior country boundary, and exterior shorelines for that country, the more linework, the slower it goes), choose the live paint tool livepainticon and click on the selection. It will turn into a “live paint group”. If  you are viewing the bounding box, it will appear slightly differently than normal handles (see below).

live_paint_step3

Step 4: Make sure the toolbox fill is a color like yellow (the default is set to no fill, so you won’t get the tool to work unless you change it). Click and drag the live paint tool over all implied polygons between lines. Watch them turn into filled polys!!!! If you don’t get an implied polygon to fill, try adjusting the gap tolerance at Object > Live Paint > Gap Options. The default settings worked fine for me, though. Not shown here are the reddish thick highlight around target polygons as the Live Paint tool is dragged acros the artwork.

live_paint_step4

Step 5: Once you’re done and all your implied polygons are colored in like a coloring book, expand the live paint group (Object > Live Paint > Expand, or use the Expand button on the control panel button strip). Ungroup twice (Object > Ungroup). The polys, lines, and hydro will all be on the building layer. Use select by similar to select just the filled polys you just made and move them to the First_order_admin_polys layer. Delete the left over country and hydro lines (you have originals elsewhere).

live_paint_step5

Step 6: Color code new state polygons and compound path related admin units (none in this instance). That’s it!

live_paint_step6

Problems? Try this tutorial video from Layers magazine and, separately, from Mordy Golding.